WO1996031790B1 - Spatial magnetic interrogation - Google Patents

Spatial magnetic interrogation

Info

Publication number
WO1996031790B1
WO1996031790B1 PCT/GB1996/000823 GB9600823W WO9631790B1 WO 1996031790 B1 WO1996031790 B1 WO 1996031790B1 GB 9600823 W GB9600823 W GB 9600823W WO 9631790 B1 WO9631790 B1 WO 9631790B1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic
tag
field
magnetic field
null
Prior art date
Application number
PCT/GB1996/000823
Other languages
French (fr)
Other versions
WO1996031790A1 (en
Filing date
Publication date
Priority claimed from GBGB9506909.2A external-priority patent/GB9506909D0/en
Priority to US08/930,228 priority Critical patent/US6144300A/en
Priority to JP53009896A priority patent/JP3647462B2/en
Priority to EP96909232A priority patent/EP0834091B1/en
Priority to CA002217762A priority patent/CA2217762C/en
Priority to BR9604784A priority patent/BR9604784A/en
Priority to DE69629693T priority patent/DE69629693T2/en
Priority to AT96909232T priority patent/ATE248379T1/en
Priority to PL96322617A priority patent/PL181016B1/en
Priority to AU52806/96A priority patent/AU716803B2/en
Application filed filed Critical
Priority to PL96341024A priority patent/PL181020B1/en
Priority to PL96341023A priority patent/PL181046B1/en
Priority to RU97118368A priority patent/RU2145722C1/en
Priority to GB9713224A priority patent/GB2313745B/en
Priority to NZ304922A priority patent/NZ304922A/en
Priority to TW085112326A priority patent/TW329001B/en
Publication of WO1996031790A1 publication Critical patent/WO1996031790A1/en
Publication of WO1996031790B1 publication Critical patent/WO1996031790B1/en
Priority to NO974587A priority patent/NO974587L/en
Priority to HK98103195A priority patent/HK1003907A1/en
Priority to US09/685,249 priority patent/US6323769B1/en

Links

Abstract

Magnetic tags or markers are disclosed, together with a variety of techniques by means of which such tags may be interrogated. In one aspect, the magnetic marker or tag which is characterised by carrying a plurality of discrete magnetically active regions in a linear array. In another aspect, the invention provides a method of interrogating a magnetic tag or marker within a predetermined interrogation zone, the tag comprising a high permeability magnetic material, for example to read data stored magnetically in the tag or to use the response of the tag to detect its presence and/or to determine its position within the interrogation zone, characterized in that the interrogation process includes the step of subjecting the tag sequentially to: (1) a magnetic field sufficient in field strength to saturate the high permeability magnetic material, and (2) a magnetic null as herein defined. Applications of such techniques are described, inter alia, in relation to (a) identifying articles to which tags are attached; (b) accurate determination of position, as in the location of surgical probes; and (c) totalisation of purchases, where each item carries a tag coded with data representing its nature and its price.

Claims

A 6AMENDED CLAIMS[received by the International Bureau on 25 September 1996 (25.09.96); original claims 1-46 replaced by amended claims 1-53 (11 pages)]
1. A magnetic marker or tag which is characterised by carrying a plurality of discrete magnetically active regions in a linear array.
2. A tag as claimed in claim 1, characterised in that said discrete magnetically active regions are supported on a substrate.
3. A tag as claimed in claim 1 or 2, characterised in that said discrete magnetically active regions are formed from a continuous strip or layer of magnetisable material discrete regions of which are magnetised and the space (s) between said magnetically active regions are non-magnetised.
4. A tag as claimed in claim 3, characterised in that said layer of magnetisable material is carried by a continuous strip of a magnetically active material.
5. A tag as claimed in claim 1, 2, 3 or 4, characterised in that the tag has two or more linear arrays of magnetically active regions .
6. A tag as claimed in claim 5, characterised in that the tag has two linear arrays disposed orthogonally.
7. A tag as claimed in any preceding claim, characterised in that each of the magnetically active regions is of substantially the same shape and size.
8. A tag as claimed in any preceding claim, characterised in that the spacing between each of the magnetically active regions is uniform.
9. A tag as claimed in any one of claims 1 to 7, characterised in that the spacing between each of the magnetically active regions is non-uniform.
10. A tag as claimed in any preceding claim, characterised in that it is in the form of a relatively long, thin strip having a preferential axis of magnetisation along its length.
11. A tag as claimed in any preceding claim, characterised in that the magnetically active regions are formed of a thin film, spin-melt material having a preferential axis of magnetisation, the preferential axes of magnetisation being aligned within the (or each) linear array.
12. A tag as claimed in claim 10, characterised in that the preferential axes of magnetisation are generated by longitudinal annealing of the thin film, spin-melt material.
13. A method of interrogating a magnetic tag or marker within a predetermined interrogation zone, the tag comprising a high permeability magnetic material, for example to read data stored magnetically in the tag or to use the response of the tag to detect its presence and/or to determine its position within the interrogation zone, characterised in that the interrogation process includes the step of subjecting the tag sequentially to: (1) a magnetic field sufficient in field strength to saturate the high permeability magnetic material, and (2) a magnetic null as herein defined.
14. A method as claimed in claim 13, characterised in that said magnetic null is caused to sweep back and 4 8
forth over a predetermined region within the interrogation zone.
15. A method as claimed in claim 13 or 14, characterised in that (a) said magnetic null lies in a plane; and (b) the saturating field occurs adjacent to said plane.
16. A method of determining the presence and/or the position of a magnetic element within a predetermined interrogation zone, the magnetic element having predetermined magnetic characteristics, which method is characterised by the steps of: (1) establishing within said interrogation zone a magnetic field pattern which comprises a relatively small region of zero magnetic field (a magnetic null) contiguous with regions where there is a magnetic field sufficient to saturate the, or a part of the, magnetic element (the saturating field) , said relatively small region being coincident with a region through which the magnetic element is passing, or can pass, or is expected to pass; (2) causing relative movement between said magnetic field and said magnetic element such that said magnetic null is caused to traverse at least a part of the magnetic element in a predetermined manner; and (3) detecting the resultant magnetic response of the magnetic element during said relative movement.
17. A method of identifying a magnetic element which possesses predetermined magnetic characteristics, which method is characterised by the steps of: (1) subjecting the magnetic element to a first magnetic field which is sufficient to induce magnetic saturation in at least a part of the magnetic element; (2) next subjecting the magnetic element to conditions of zero magnetic field 9
(i.e. a magnetic null), the zero field occupying a relatively small volume and being contiguous with said first magnetic field; (3) causing relative movement between the applied magnetic field and said magnetic element such that said magnetic null is caused to traverse at least a part of the magnetic element in a predetermined manner; and (4) detecting the resultant magnetic response of the magnetic element during said relative movement.
18. A method according to claim 17, characterised in that said magnetic element is caused to traverse an interrogation zone within which the required magnetic conditions are generated.
19. A method of identifying a magnetic element, the magnetic element having predetermined magnetic characteristics, which method is characterised by the steps of: (1) causing the magnetic element to enter an interrogation zone within which there is established a magnetic field pattern which comprises a relatively small region of zero magnetic field (a magnetic null) contiguous with regions where there is a magnetic field sufficient to saturate the, or a part of the, magnetic element (the saturating field) ; (2) causing the magnetic element to be moved through the saturating field until it reaches the magnetic null; (3) causing relative movement between said magnetic field and said magnetic element such that said magnetic null is caused to traverse at least a part of the magnetic element in a predetermined manner; and (4) detecting the resultant magnetic response of the magnetic element during said relative movement.
20. A method according to claim 16, 17, 18 or 19, characterised in that said relative movement is produced by sweeping the applied magnetic field over the magnetic element.
21. A method according to any one of claims 13 to 20, characterised in that said magnetic element is generally elongate and in that the zero field direction of said magnetic null is arranged to extend along the major axis of said magnetic element.
22. A method according to any one of claims 13 to 20, characterised in that said magnetic element is in the form of a thin film and in that the zero field direction of said magnetic null is arranged to be aligned with the axis of magnetic sensitivity of the film.
23. A method as claimed in any one of claims 13 to 22, characterised in that said magnetic field or magnetic field pattern is established by the application to said spatial volume or to said interrogation zone of two magnetic fields of opposite polarity.
24. A method as claimed in claim 23, characterised in that the application of said two magnetic fields is achieved by use of one or more coils carrying direct current.
25. A method as claimed in any one of claims 13 to 24, characterised in that said magnetic field or magnetic field pattern is established by the use of one or more permanent magnets.
26. A method according to claim 24, characterised in that said coil(s) carry/carries a substantially constant current so as to maintain the magnetic null at a fixed point . 5 1
27. A method according to claim 24, characterised in that said coil(s) carry/carries a current whose magnitude varies in a predetermined cycle so that the position of the magnetic null is caused to oscillate in a predetermined manner.
28. A method according to claim 25, characterised in that said permanent magnet (s) is or are accompanied by a coil or coils which carry or carries a current whose magnitude varies according to a predetermined cycle so that the position of the magnetic null is caused to oscillate in a predetermined manner.
29. A method as claimed in any one of claims 16 to 28, characterised in that said relative movement is caused by the application to said magnetic field or magnetic field pattern of an alternating magnetic field.
30. A method of determining the presence and/or the position of a magnetic element, which is characterised by the steps of: (1) applying a magnetic field to a region where the magnetic element is, or is expected to be, located, said magnetic field comprising two opposed field components, generated by at least one magnetic field source, which result in a null field at a predetermined position; (2) causing relative movement between said magnetic field and said magnetic element; and (3) detecting the resultant magnetic response of the magnetic element during said relative movement.
31. A method according to claim 29 or 30, characterised in that relative movement between said magnetic field and said magnetic element is caused by applying a relatively low amplitude alternating magnetic field superimposed on a DC field. 52
32. A method according to claim 31, characterised in that said relatively low amplitude alternating magnetic field has a frequency in the range from 10Hz to 100kHz.
33. A method according to any one of claims 13 to 32, characterised in that detection of the magnetic response of said magnetic element comprises observation of harmonics which are generated by the magnetic element from an applied AC field as its magnetisation state is altered by passing through the magnetic null.
34. A method of determining the precise location of an object, characterised in that the method comprises: (a) securing to the object a small piece of a magnetic material which is of high magnetic permeability; (b) applying to the region in which said object is located a magnetic field comprising two opposed field components, generated by magnetic field sources, which result in a null field at a position intermediate said magnetic field sources; (c) applying a low amplitude, high frequency interrogating field to said region; (d) causing the position of the null field to sweep slowly back and forth over a predetermined range of movement; (e) observing the magnetic interaction between said applied magnetic field and said small piece of magnetic material; and (f) calculating the position of the object from a consideration of said magnetic interaction and form the known magnetic parameters relating to said applied field and to said small piece of magnetic material.
35. A method according to claim 34, characterised in that said object is a surgical instrument.
36. A method according to claim 35, characterised in that said object is a surgical probe or needle. 53
37. A method according to claim 34, 35 or 36, characterised in that said small piece of high magnetic permeability magnetic material is in the form of a thin foil, a wire or a thin film.
38. A method according to any one of claims 34 to 37, characterised in that said magnetic field sources are coils.
39. A method according to any one of claims 34 to 37, characterised in that one or both of said magnetic field sources is/are permanent magnet (s) .
40. A method according to any one of claims 34 to 39, characterised in that the applied magnetic field is generated by three sets of mutually orthogonal magnetic field sources.
41. A method according to claim 39 or 40, characterised in that the applied magnetic field is generated by operating sequential field scans and calculating, for each scan, the position of the centre of the harmonic output from the magnetic material.
42. A method according to claim 41, characterised in that there are nine sequential field scans, operated according to the following table, in which the magnetic field sources are identified as a, b and c and the scans are numbered from 1-9 (scanning order being of no significance) : 5
Orthogonal I 2 3 4 5 6 7 8 9 field source a ON ON ON OFF OFF ON OFF OFF ON b OFF ON OFF ON ON ON OFF ON OFF c OFF OFF ON OFF ON OFF ON ON ON
43. A method according to claim 40, characterised in that three orthogonal coil sets are continuously excited so as to create a continuously rotating field direction which covers the volume of interest in controlled sweeps of predetermined width.
44. A method of coding and/or labelling individual articles within a predetermined set of articles by means of data characteristic of the articles, e.g. article price and/or the nature of the goods constituting the articles, which method is characterised by applying to each article a magnetic tag or marker carrying a predetermined arrangement of magnetic zones unique to that article or to that article and others sharing the same characteristic, e.g. article price and/or the nature of the goods constituting the article, said magnetic tag or marker being susceptible to interrogation by an applied magnetic field to generate a response indicative of the magnetic properties of the tag or marker and hence indicative of the nature of the article carrying the magnetic tag or marker.
45. A method according to claim 44, characterised in that said magnetic tag or marker comprises a plurality of magnetic zones each displaying high permeability. 55
46. A method according to claim 45, characterised in that each magnetic zone can be magnetically biassed by means of a second layer of medium-coercivity magnetic material.
47. A method of totalising data (e.g. prices) from an assembly of individual articles each carrying a magnetic tag as claimed in any one of claims 1 to 11, the tags carrying data representative of a specific characteristic (e.g. price) of the article to which they are attached, characterised in that the assembly of articles is caused to move through an interrogation zone where the assembly is subjected to a method as claimed in any one of claims 39 to 42; and processing the signals received during said method to generate the required summing of individual datum values.
48. A device for reading a magnetic tag, which device comprises a plurality of permanent magnets disposed in a circular array around a gap through which a tag to be read can pass, the poles of said permanent magnets being disposed so that each of the magnets has its pole of one polarity (for example North) positioned on the inside of the circular array, and its pole of the opposite polarity (for example South) positioned on the outside of the circular array; and a coil disposed coaxially with said circular array adjacent to said permanent magnets.
49. A device for reading a magnetic tag, which device comprises a plurality of permanent magnets disposed in a circular array around a gap through which a tag to be read can pass, the permanent magnets being disposed such that for each of them its magnetic poles lie on an imaginary line extending radially outwardly from the centre of said circular array, poles of one given 5 6 polarity all being positioned radially inwardly and poles of the opposite polarity all being positioned radially outwardly of the array; and a coil disposed within said circular array adjacent to said permanent magnets.
50. A device as claimed in claim 48 or 49, wherein said circular array of permanent magnets consists of an even number of permanent magnets.
51. A device as claimed in claim 48, 49 or 50, wherein said permanent magnets are polymer-bonded ferrite magnets.
52. A position sensor which includes a device as claimed in claim 48, 49, 50 or 51.
53. Apparatus for interrogating a magnetically coded tag, which apparatus is characterised by an electrical circuit which comprises a source of energy at frequency 2f and output means for providing an electrical output, said source being coupled to said output means by (i) means for halving the frequency of said source energy; (ii) first filter means arranged substantially to reject energy at frequency 2f; (iii) tuned circuit means tuned to energy at frequency f and including a transmitter coil adapted to radiate energy towards a magnetically coded tag positioned so as to be influenced by said radiated energy and a receiver coil (which may be the same coil as said transmitter coil) for receiving energy radiated by the tag in response to the received energy; and (iv) second filter means arranged substantially to reject energy at frequency f and to pass energy at frequency 2f, and wherein said output means is arranged to provide an output which is a function of the phase difference between the source and the output of said second filter means.
PCT/GB1996/000823 1995-04-02 1996-04-03 Spatial magnetic interrogation WO1996031790A1 (en)

Priority Applications (18)

Application Number Priority Date Filing Date Title
NZ304922A NZ304922A (en) 1995-04-04 1996-04-03 The use of a passive data tag system which employs small amounts of very high permeability magnetic material and a scanned magnetic field for interrogation
PL96341023A PL181046B1 (en) 1995-04-04 1996-04-03 Magnetic marker
PL96341024A PL181020B1 (en) 1995-04-04 1996-04-03 Apparatus for producing response to a magnetically encoded marker
RU97118368A RU2145722C1 (en) 1995-04-04 1996-04-03 Three-dimensional magnetic detection
JP53009896A JP3647462B2 (en) 1995-04-04 1996-04-03 Spatial magnetic inquiry
DE69629693T DE69629693T2 (en) 1995-04-04 1996-04-03 SPATIAL MAGNETIC REQUEST
AT96909232T ATE248379T1 (en) 1995-04-04 1996-04-03 SPATIAL MAGNETIC INQUIRY ARRANGEMENT
PL96322617A PL181016B1 (en) 1995-04-04 1996-04-03 Three-dimensional examination by means of magnetic field
AU52806/96A AU716803B2 (en) 1995-04-04 1996-04-03 Spatial magnetic interrogation
US08/930,228 US6144300A (en) 1995-04-02 1996-04-03 Spatial magnetic interrogation
EP96909232A EP0834091B1 (en) 1995-04-04 1996-04-03 Spatial magnetic interrogation
BR9604784A BR9604784A (en) 1995-04-04 1996-04-03 Methods for interrogating a magnetic element having non-linear magnetic properties to determine the location of an object for encoding and / or labeling individual articles and for totalizing data apparatus for reading a magnetic label and for interrogating a magnetically encoded label and magnetic marker or tag
CA002217762A CA2217762C (en) 1995-04-04 1996-04-03 Spatial magnetic interrogation
GB9713224A GB2313745B (en) 1995-04-04 1996-04-03 Spatial magnetic interrogation
TW085112326A TW329001B (en) 1995-04-04 1996-10-09 Spatial magnetic interrogation
NO974587A NO974587L (en) 1995-04-04 1997-10-03 Spatial magnetic interrogation, especially in connection with labels
HK98103195A HK1003907A1 (en) 1995-04-04 1998-04-16 Spatial magnetic interrogation
US09/685,249 US6323769B1 (en) 1995-04-04 2000-10-10 Apparatus for interrogating a magnetically coded tag

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9506909.2 1995-04-04
GBGB9506909.2A GB9506909D0 (en) 1995-04-04 1995-04-04 Spatial magnetic interrogation system

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US09/685,250 Division US6323770B1 (en) 1995-04-02 2000-10-10 Apparatus for interrogating a magnetically coded tag
US09/685,251 Division US6373388B1 (en) 1995-04-04 2000-10-10 Coding articles

Publications (2)

Publication Number Publication Date
WO1996031790A1 WO1996031790A1 (en) 1996-10-10
WO1996031790B1 true WO1996031790B1 (en) 1996-11-07

Family

ID=10772460

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1996/000823 WO1996031790A1 (en) 1995-04-02 1996-04-03 Spatial magnetic interrogation

Country Status (22)

Country Link
US (5) US6144300A (en)
EP (1) EP0834091B1 (en)
JP (1) JP3647462B2 (en)
KR (1) KR100262363B1 (en)
CN (1) CN1153984C (en)
AT (1) ATE248379T1 (en)
AU (1) AU716803B2 (en)
BR (1) BR9604784A (en)
CA (1) CA2217762C (en)
CZ (1) CZ293167B6 (en)
DE (1) DE69629693T2 (en)
ES (1) ES2205021T3 (en)
GB (1) GB9506909D0 (en)
HK (1) HK1003907A1 (en)
HU (1) HUP9802671A3 (en)
MX (1) MX9707744A (en)
NO (1) NO974587L (en)
NZ (1) NZ304922A (en)
PL (3) PL181046B1 (en)
RU (1) RU2145722C1 (en)
TW (1) TW329001B (en)
WO (1) WO1996031790A1 (en)

Families Citing this family (145)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9506909D0 (en) * 1995-04-04 1995-05-24 Scient Generics Ltd Spatial magnetic interrogation system
AU738833B2 (en) * 1995-04-04 2001-09-27 Flying Null Limited Apparatus for interrogating magnetic tags
US6075441A (en) 1996-09-05 2000-06-13 Key-Trak, Inc. Inventoriable-object control and tracking system
US5944023A (en) * 1995-12-07 1999-08-31 Sims Deltec, Inc. Systems and methods for determining the location of an implanted device including a magnet
GB2314418B (en) * 1996-06-19 1999-07-07 Flying Null Ltd Magnetic sensing and reading devices
GB9619896D0 (en) * 1996-09-24 1996-11-06 Flying Null Ltd Improvements in or relating to magnetic sensors
GB9620190D0 (en) * 1996-09-27 1996-11-13 Flying Null Ltd Improved methods for coding magnetic tags
GB9621000D0 (en) * 1996-10-09 1996-11-27 Flying Null Ltd Magnetic tags and techniques
GB9717574D0 (en) * 1997-08-19 1997-10-22 Flying Null Ltd Catheter location
DE69822841T2 (en) * 1997-08-19 2005-04-21 Flying Null Ltd IMPROVEMENT IN SURGERY EQUIPMENT AND ITS LOCALIZATION
DE19743829A1 (en) 1997-10-04 1999-04-08 Meto International Gmbh System for providing counterfeit-proof information about an article
GB2318089A (en) 1997-11-13 1998-04-15 Flying Null Ltd Banknote with two magnetic security features
GB9806923D0 (en) * 1998-03-31 1998-05-27 Flying Null Ltd Position sensing
GB9815917D0 (en) * 1998-07-21 1998-09-23 Flying Null Ltd Security packaging
GB9816969D0 (en) * 1998-08-04 1998-09-30 Flying Null Ltd Magnetic tags and readers therefor
WO2000016564A1 (en) 1998-09-11 2000-03-23 Key-Trak, Inc. Object control and tracking system with zonal transition detection
US6262664B1 (en) 1998-09-11 2001-07-17 Key-Trak, Inc. Tamper detection prevention for an object control and tracking system
US6195005B1 (en) 1998-09-11 2001-02-27 Key-Trak, Inc. Object carriers for an object control and tracking system
US6232876B1 (en) 1998-09-11 2001-05-15 Key-Trak, Inc. Mobile object tracking system
US6204764B1 (en) 1998-09-11 2001-03-20 Key-Trak, Inc. Object tracking system with non-contact object detection and identification
EP1145048B1 (en) * 1998-12-23 2003-07-23 Flying Null Limited Reading devices for magnetic tags
US6622567B1 (en) * 1999-03-01 2003-09-23 Microstrain, Inc. Micropower peak strain detection system for remote interrogation
GB9918657D0 (en) * 1999-08-06 1999-10-13 Flying Null Ltd Coded label information extraction method
GB9919100D0 (en) * 1999-08-12 1999-10-13 Sentec Ltd Improved tag readers
MXPA02003784A (en) 1999-10-16 2002-12-13 Glaxo Group Ltd Device housing for an aerosol container.
IL132499A0 (en) * 1999-10-21 2001-03-19 Advanced Coding Systems Ltd A security system for protecting various items and a method for reading a code pattern
GB2355889A (en) * 1999-10-26 2001-05-02 Endeavour Consulting Ltd Controlling operation of a device within a restricted area by detecting the presence of the device and instructing it to restrict its operation
CO5270018A1 (en) 1999-12-11 2003-04-30 Glaxo Group Ltd MEDICINAL DISTRIBUTOR
US20030079744A1 (en) 1999-12-11 2003-05-01 Bonney Stanley George Medicament dispenser
FR2806483B1 (en) * 2000-03-14 2004-01-09 Electronique Angelidis Et Sarr METHOD FOR DETECTION AND IDENTIFICATION OF AN OBJECT AMONG A PLURALITY OF OBJECTS, AND DEVICE FOR ITS IMPLEMENTATION
JP3579868B2 (en) * 2000-05-30 2004-10-20 株式会社山武 Sensor device, setting device, readout device, and article management system
GB0013619D0 (en) 2000-06-06 2000-07-26 Glaxo Group Ltd Sample container
US6404340B1 (en) * 2000-06-19 2002-06-11 Massachusetts Institute Of Technology Multiple-axis tracking of passive resonant structures
US6472987B1 (en) * 2000-07-14 2002-10-29 Massachusetts Institute Of Technology Wireless monitoring and identification using spatially inhomogeneous structures
US7191777B2 (en) 2000-07-15 2007-03-20 Glaxo Group Limited Medicament dispenser
GB0017882D0 (en) * 2000-07-21 2000-09-06 Sentec Ltd Anti collision for passive magnetic tags
WO2002028739A2 (en) 2000-10-03 2002-04-11 Adtab Limited Container with removable protective cover
GB0026647D0 (en) 2000-10-31 2000-12-13 Glaxo Group Ltd Medicament dispenser
WO2002084221A1 (en) * 2001-04-18 2002-10-24 Advanced Coding Systems Ltd. Magnetic position sensor
GB0125134D0 (en) 2001-10-19 2001-12-12 Glaxo Group Ltd Medicament dispenser
GB0130284D0 (en) 2001-12-19 2002-02-06 Glaxo Group Ltd Medicament dispenser
US20050128051A1 (en) * 2001-12-27 2005-06-16 Robert Dickinson Verification key for replacement parts
GB2383500A (en) * 2002-10-01 2003-06-25 Flying Null Ltd Verifying the authenticity and determining the correct connection of an attachable component using a tag and modifying the operation of the apparatus
US6972682B2 (en) 2002-01-18 2005-12-06 Georgia Tech Research Corporation Monitoring and tracking of assets by utilizing wireless communications
GB0217199D0 (en) 2002-07-25 2002-09-04 Glaxo Group Ltd Medicament dispenser
GB0201677D0 (en) 2002-01-25 2002-03-13 Glaxo Group Ltd Medicament dispenser
US20070062525A1 (en) 2002-01-25 2007-03-22 Bonney Stanley G Medicament dispenser
WO2003063754A1 (en) 2002-01-30 2003-08-07 Glaxo Group Limited Compliance aid
GB0209528D0 (en) 2002-04-26 2002-06-05 Glaxo Group Ltd Medicament dispenser
FR2841021B1 (en) * 2002-06-13 2004-12-24 Systemig Sa MONITORING AND / OR MONITORING DEVICE USING AN ELECTRONIC LABEL, A READER AND A STATUS ENCODER
US7352771B2 (en) * 2002-10-08 2008-04-01 Colder Products Company Data collision detection device and method
GB0317374D0 (en) 2003-07-24 2003-08-27 Glaxo Group Ltd Medicament dispenser
GB0323349D0 (en) * 2003-10-06 2003-11-05 Linksure Ltd Verification means
US7906345B2 (en) * 2003-11-12 2011-03-15 The Board Of Trustees Of The Leland Stanford Junior University Magnetic nanoparticles, magnetic detector arrays, and methods for their use in detecting biological molecules
CA2555347A1 (en) 2004-02-16 2005-09-01 Stephen Edward Augustyn Counter for use with a medicament dispenser
US7230537B2 (en) * 2004-04-15 2007-06-12 Matsushita Electric Industrial Co., Ltd. Product identification system using IC tag units, and a digital content management system
US7102521B2 (en) * 2004-04-30 2006-09-05 Hewlett-Packard Development Company, L.P. Method and system for identifying RFID-tagged objects
GB0418278D0 (en) 2004-08-16 2004-09-15 Glaxo Group Ltd Medicament dispenser
US20070169715A1 (en) 2004-12-13 2007-07-26 Innovive Inc. Containment systems and components for animal husbandry
US8156899B2 (en) 2004-12-13 2012-04-17 Innovive Inc. Containment systems and components for animal husbandry: nested covers
US8226001B1 (en) 2010-06-23 2012-07-24 Fiteq, Inc. Method for broadcasting a magnetic stripe data packet from an electronic smart card
KR20070119051A (en) 2005-03-26 2007-12-18 프라이베이시스, 인크. Electronic financial transaction cards and methods
US8684267B2 (en) 2005-03-26 2014-04-01 Privasys Method for broadcasting a magnetic stripe data packet from an electronic smart card
KR20080003006A (en) 2005-04-27 2008-01-04 프라이베이시스, 인크. Electronic cards and methods for making same
US7954455B2 (en) 2005-06-14 2011-06-07 Innovive, Inc. Cage cover with filter, shield and nozzle receptacle
JP2009500249A (en) * 2005-06-30 2009-01-08 ノバ・ケミカルズ・インコーポレイテツド Magnetic composite material and article containing the same
RU2292588C1 (en) * 2005-07-12 2007-01-27 Бетелин Владимир Борисович Device for identification and method for scanning the same
GB0515584D0 (en) 2005-07-28 2005-09-07 Glaxo Group Ltd Medicament dispenser
US8784336B2 (en) 2005-08-24 2014-07-22 C. R. Bard, Inc. Stylet apparatuses and methods of manufacture
MX2008015202A (en) * 2006-06-02 2008-12-09 Plymouth Francaise Sa Detection system suitable for identifying and tracking buried pipes or others bodies buried in the ground or embedded in civil engineering works.
US7753779B2 (en) 2006-06-16 2010-07-13 Bally Gaming, Inc. Gaming chip communication system and method
US8647191B2 (en) 2006-09-26 2014-02-11 Bally Gaming, Inc. Resonant gaming chip identification system and method
US7794407B2 (en) 2006-10-23 2010-09-14 Bard Access Systems, Inc. Method of locating the tip of a central venous catheter
US8388546B2 (en) 2006-10-23 2013-03-05 Bard Access Systems, Inc. Method of locating the tip of a central venous catheter
GB0622827D0 (en) 2006-11-15 2006-12-27 Glaxo Group Ltd Sheet driver for use in a drug dispenser
US7999681B2 (en) * 2007-01-24 2011-08-16 United Security Applications Id, Inc. Method of shipping and tracking inventory
WO2008127998A1 (en) 2007-04-11 2008-10-23 Innovive, Inc. Animal husbandry drawer caging
US8920236B2 (en) 2007-11-02 2014-12-30 Bally Gaming, Inc. Game related systems, methods, and articles that combine virtual and physical elements
US10751509B2 (en) 2007-11-26 2020-08-25 C. R. Bard, Inc. Iconic representations for guidance of an indwelling medical device
US8781555B2 (en) 2007-11-26 2014-07-15 C. R. Bard, Inc. System for placement of a catheter including a signal-generating stylet
US10524691B2 (en) 2007-11-26 2020-01-07 C. R. Bard, Inc. Needle assembly including an aligned magnetic element
US9649048B2 (en) 2007-11-26 2017-05-16 C. R. Bard, Inc. Systems and methods for breaching a sterile field for intravascular placement of a catheter
US8849382B2 (en) 2007-11-26 2014-09-30 C. R. Bard, Inc. Apparatus and display methods relating to intravascular placement of a catheter
US10449330B2 (en) 2007-11-26 2019-10-22 C. R. Bard, Inc. Magnetic element-equipped needle assemblies
US9521961B2 (en) 2007-11-26 2016-12-20 C. R. Bard, Inc. Systems and methods for guiding a medical instrument
EP3202318B1 (en) 2007-11-26 2020-10-21 C.R. Bard, Inc. Integrated system for intravascular placement of a catheter
US8478382B2 (en) 2008-02-11 2013-07-02 C. R. Bard, Inc. Systems and methods for positioning a catheter
EP2297736B1 (en) * 2008-06-26 2016-02-10 Bluechiip Pty Ltd Rfid memory devices
US8223014B2 (en) * 2008-07-02 2012-07-17 Essence Security International Ltd. Energy-conserving triggered ID system and method
US8199013B2 (en) * 2008-08-12 2012-06-12 Sensormatic Electronics, LLC Metal detection system with integrated directional people counting system
WO2010022370A1 (en) 2008-08-22 2010-02-25 C.R. Bard, Inc. Catheter assembly including ecg sensor and magnetic assemblies
US8437833B2 (en) 2008-10-07 2013-05-07 Bard Access Systems, Inc. Percutaneous magnetic gastrostomy
US8478379B2 (en) * 2008-11-12 2013-07-02 Biosense Webster, Inc. Probe visualization based on mechanical properties
ES2745861T3 (en) 2009-06-12 2020-03-03 Bard Access Systems Inc Apparatus, computer-aided data-processing algorithm, and computer storage medium for positioning an endovascular device in or near the heart
US9532724B2 (en) 2009-06-12 2017-01-03 Bard Access Systems, Inc. Apparatus and method for catheter navigation using endovascular energy mapping
US9386942B2 (en) 2009-06-26 2016-07-12 Cianna Medical, Inc. Apparatus, systems, and methods for localizing markers or tissue structures within a body
WO2010151843A2 (en) * 2009-06-26 2010-12-29 Cianna Medical, Inc. Apparatus, systems, and methods for localizing markers or tissue structures within a body
WO2011019760A2 (en) 2009-08-10 2011-02-17 Romedex International Srl Devices and methods for endovascular electrography
EP2482719A4 (en) 2009-09-29 2016-03-09 Bard Inc C R Stylets for use with apparatus for intravascular placement of a catheter
US10639008B2 (en) 2009-10-08 2020-05-05 C. R. Bard, Inc. Support and cover structures for an ultrasound probe head
WO2011044421A1 (en) 2009-10-08 2011-04-14 C. R. Bard, Inc. Spacers for use with an ultrasound probe
CN102821679B (en) 2010-02-02 2016-04-27 C·R·巴德股份有限公司 For the apparatus and method that catheter navigation and end are located
ES2864665T3 (en) 2010-05-28 2021-10-14 Bard Inc C R Apparatus for use with needle insertion guidance system
EP2912999B1 (en) 2010-05-28 2022-06-29 C. R. Bard, Inc. Apparatus for use with needle insertion guidance system
US8317103B1 (en) 2010-06-23 2012-11-27 FiTeq Method for broadcasting a magnetic stripe data packet from an electronic smart card
KR101856267B1 (en) 2010-08-20 2018-05-09 씨. 알. 바드, 인크. Reconfirmation of ecg-assisted catheter tip placement
US8425425B2 (en) 2010-09-20 2013-04-23 M. Dexter Hagy Virtual image formation method for an ultrasound device
US9516857B2 (en) 2010-10-11 2016-12-13 Innovive, Inc. Rodent containment cage monitoring apparatus and methods
US8801693B2 (en) 2010-10-29 2014-08-12 C. R. Bard, Inc. Bioimpedance-assisted placement of a medical device
JP6008960B2 (en) 2011-07-06 2016-10-19 シー・アール・バード・インコーポレーテッドＣ Ｒ Ｂａｒｄ Ｉｎｃｏｒｐｏｒａｔｅｄ Needle length determination and calibration for insertion guidance systems
USD724745S1 (en) 2011-08-09 2015-03-17 C. R. Bard, Inc. Cap for an ultrasound probe
USD699359S1 (en) 2011-08-09 2014-02-11 C. R. Bard, Inc. Ultrasound probe head
US9211107B2 (en) 2011-11-07 2015-12-15 C. R. Bard, Inc. Ruggedized ultrasound hydrogel insert
US9306626B2 (en) * 2012-05-16 2016-04-05 Broadcom Corporation NFC device context determination through proximity gestural movement detection
WO2013188833A2 (en) 2012-06-15 2013-12-19 C.R. Bard, Inc. Apparatus and methods for detection of a removable cap on an ultrasound probe
EP2682893B1 (en) * 2012-07-06 2018-10-31 Deutsche Telekom AG Magnetic tag device, reader for a magnetic tag, and method of interrogating a magnetic tag
US9713437B2 (en) 2013-01-26 2017-07-25 Cianna Medical, Inc. Microwave antenna apparatus, systems, and methods for localizing markers or tissue structures within a body
US10660542B2 (en) 2013-01-26 2020-05-26 Cianna Medical, Inc. RFID markers and systems and methods for identifying and locating them
US10729098B2 (en) 2013-07-01 2020-08-04 Innovive, Inc. Cage rack monitoring apparatus and methods
CN104346592B (en) * 2013-08-08 2018-08-10 联想(北京)有限公司 A kind of close range wireless communication equipment, card and a kind of information cuing method
EP3073910B1 (en) 2014-02-06 2020-07-15 C.R. Bard, Inc. Systems for guidance and placement of an intravascular device
EP3177134B1 (en) 2014-07-25 2022-08-17 Innovive, Inc. Animal containment enrichment compositions and methods
US10973584B2 (en) 2015-01-19 2021-04-13 Bard Access Systems, Inc. Device and method for vascular access
US10610326B2 (en) 2015-06-05 2020-04-07 Cianna Medical, Inc. Passive tags, and systems and methods for using them
US10349890B2 (en) 2015-06-26 2019-07-16 C. R. Bard, Inc. Connector interface for ECG-based catheter positioning system
US10325439B2 (en) 2015-07-03 2019-06-18 Custom Security Industries, Inc. Article identification reader, marker element for article identification and method of article identification
DE102015121812B4 (en) * 2015-12-15 2017-11-02 Bogen Electronic Gmbh An article, method of making the article, and method of determining a position of the article
US11000207B2 (en) 2016-01-29 2021-05-11 C. R. Bard, Inc. Multiple coil system for tracking a medical device
AU2017226261A1 (en) 2016-03-03 2018-10-04 Cianna Medical, Inc. Implantable markers, and systems and methods for using them
WO2017177074A1 (en) 2016-04-06 2017-10-12 Cianna Medical, Inc. Reflector markers and systems and methods for identifying and locating them
ES2581127B2 (en) * 2016-04-13 2017-05-04 Universidad Complutense De Madrid Label, system and method for long-distance object detection
CN109937005B (en) 2016-07-12 2023-08-08 P·W·古德维尔 Magnetic particle imaging
US10596394B2 (en) 2016-07-28 2020-03-24 Sun Nuclear Corporation Beam angle direction determination
EP3531827B1 (en) 2016-10-28 2022-10-12 Innovive, Inc. Metabolic caging
WO2018175667A1 (en) 2017-03-21 2018-09-27 Cianna Medical, Inc. Reflector markers and systems and methods for identifying and locating them
US11231469B2 (en) 2017-08-16 2022-01-25 The Regents Of The University Of California Pulsed magnetic particle imaging systems and methods
US11883150B2 (en) 2018-09-06 2024-01-30 Cianna Medical, Inc. Systems for identifying and locating reflectors using orthogonal sequences of reflector switching
US10992079B2 (en) 2018-10-16 2021-04-27 Bard Access Systems, Inc. Safety-equipped connection systems and methods thereof for establishing electrical connections
CN109608940A (en) * 2018-12-17 2019-04-12 惠州市华阳光学技术有限公司 One kind having a variety of anti-fraud functional pigment flakes and preparation method thereof
CN113747938A (en) 2019-03-13 2021-12-03 马格内蒂克因赛特公司 Magnetic particle actuator
CN112179258B (en) * 2020-09-24 2022-07-05 长虹美菱股份有限公司 Box clamp position detection device and detection method
EP4008289A1 (en) 2020-12-03 2022-06-08 Koninklijke Philips N.V. Identifying system for identifying a medical tool
WO2024089502A1 (en) 2022-10-28 2024-05-02 Medtronic, Inc. System and method for illustrating a pose of an object
WO2024089503A1 (en) 2022-10-28 2024-05-02 Medtronic, Inc. System and method for illustrating a pose of an object
WO2024089504A1 (en) 2022-10-28 2024-05-02 Medtronic, Inc. System operable to determine a pose of an instrument

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3611327A (en) * 1968-03-18 1971-10-05 Honeywell Inf Systems Magnetic film array
US3964042A (en) * 1973-06-25 1976-06-15 Sperry Rand Corporation Static magnetic field metal detector
US3983552A (en) * 1975-01-14 1976-09-28 American District Telegraph Company Pilferage detection systems
US4613818A (en) * 1983-06-20 1986-09-23 The Medical College Of Wisconsin, Inc. Nuclear magnetic resonance blood flowmeter
CA1234892A (en) * 1984-02-16 1988-04-05 Pierre Taillefer Security tag detection system
US4751516A (en) * 1985-01-10 1988-06-14 Lichtblau G J Antenna system for magnetic and resonant circuit detection
EP0295028B1 (en) * 1987-06-08 1993-04-14 Esselte Meto International GmbH Magnetic devices
GB8800879D0 (en) * 1988-01-15 1988-02-17 Scient Generics Ltd Location system
US5204526A (en) * 1988-02-08 1993-04-20 Fuji Electric Co., Ltd. Magnetic marker and reading and identifying apparatus therefor
EP0401835B1 (en) * 1989-06-09 1997-08-13 Matsushita Electric Industrial Co., Ltd. A magnetic material
US5017907A (en) * 1990-01-16 1991-05-21 Pitney Bowes Inc. Double pulse magnetic markers
US5005001A (en) * 1990-04-05 1991-04-02 Pitney Bowes Inc. Field generation and reception system for electronic article surveillance
US5083112A (en) * 1990-06-01 1992-01-21 Minnesota Mining And Manufacturing Company Multi-layer thin-film eas marker
DE4022739A1 (en) * 1990-07-17 1992-01-23 Gao Ges Automation Org DEVICE FOR TESTING MEASURING OBJECTS EQUIPPED WITH MAGNETIC PROPERTIES
US5126720A (en) * 1991-01-17 1992-06-30 Knogo Corporation Method and apparatus for deactivating magnetic targets
US5151684A (en) * 1991-04-12 1992-09-29 Johnsen Edward L Electronic inventory label and security apparatus
US5580664A (en) * 1992-12-23 1996-12-03 Minnesota Mining And Manufacturing Company Dual status thin-film eas marker having multiple magnetic layers
US5406262A (en) * 1993-06-16 1995-04-11 Security Tag Systems, Inc. Adjusting magnetic bias field intensity in EAS presence detection system to enhance detection
US5594229A (en) * 1993-07-12 1997-01-14 Nhk Spring Co., Ltd. Method and apparatus for checking the authenticity of a checking object by detecting magnetic flux reversals
US5539394A (en) * 1994-03-16 1996-07-23 International Business Machines Corporation Time division multiplexed batch mode item identification system
EP1039412A1 (en) * 1994-11-17 2000-09-27 Minnesota Mining And Manufacturing Company Remote identification system
GB9506909D0 (en) * 1995-04-04 1995-05-24 Scient Generics Ltd Spatial magnetic interrogation system
US5729201A (en) * 1995-06-29 1998-03-17 International Business Machines Corporation Identification tags using amorphous wire

Similar Documents

Publication Publication Date Title
WO1996031790B1 (en) Spatial magnetic interrogation
EP0834091B1 (en) Spatial magnetic interrogation
RU97118368A (en) SPATIAL MAGNETIC POLL
AU717499B2 (en) Magnetic sensing and reading devices
CA2268093C (en) Magnetic interrogation techniques
GB2280771A (en) Document validation
GB2322769A (en) Magnetic Coding of Articles
Hashi et al. Wireless magnetic motion capture system—Compensatory tracking of positional error caused by mutual inductance
CA2320669C (en) Device for reading magnetic tags
AU738801B2 (en) Magnetic coding of articles
GB2417857A (en) A Magnetic Tag and System for Reading a Magnetic Tag
AU738833B2 (en) Apparatus for interrogating magnetic tags
Merriam Time Domain EM Profiling Over a Shallow Conducting Target