CA2319237A1 - Magnetic markers or tags - Google Patents

Magnetic markers or tags Download PDF

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Publication number
CA2319237A1
CA2319237A1 CA002319237A CA2319237A CA2319237A1 CA 2319237 A1 CA2319237 A1 CA 2319237A1 CA 002319237 A CA002319237 A CA 002319237A CA 2319237 A CA2319237 A CA 2319237A CA 2319237 A1 CA2319237 A1 CA 2319237A1
Authority
CA
Canada
Prior art keywords
tags
magnetic markers
magnetisation
active regions
magnetically active
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002319237A
Other languages
French (fr)
Other versions
CA2319237C (en
Inventor
Andrew Nicholas Dames
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Flying Null Ltd
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GBGB9506909.2A external-priority patent/GB9506909D0/en
Application filed by Individual filed Critical Individual
Publication of CA2319237A1 publication Critical patent/CA2319237A1/en
Application granted granted Critical
Publication of CA2319237C publication Critical patent/CA2319237C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Geophysics And Detection Of Objects (AREA)
  • Burglar Alarm Systems (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Near-Field Transmission Systems (AREA)
  • Thin Magnetic Films (AREA)

Abstract

A magnetic marker or tag which is characterised by a substrate carrying a plurality of discrete magnetically active regions disposed in one or more linear arrays, the magnetically active regions being formed of a thin film or spin-melt material having a preferential axis of magnetisation, and the preferential axes of magnetisation being aligned within the (or each) linear aray.
CA002319237A 1995-04-04 1996-04-03 Magnetic markers or tags Expired - Fee Related CA2319237C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB9506909.2A GB9506909D0 (en) 1995-04-04 1995-04-04 Spatial magnetic interrogation system
GB9506909.2 1995-04-04
CA002217762A CA2217762C (en) 1995-04-04 1996-04-03 Spatial magnetic interrogation

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA002217762A Division CA2217762C (en) 1995-04-04 1996-04-03 Spatial magnetic interrogation

Publications (2)

Publication Number Publication Date
CA2319237A1 true CA2319237A1 (en) 1996-10-10
CA2319237C CA2319237C (en) 2005-10-11

Family

ID=25679703

Family Applications (4)

Application Number Title Priority Date Filing Date
CA002319238A Expired - Fee Related CA2319238C (en) 1995-04-04 1996-04-03 Magnetic coding of articles
CA002320669A Expired - Fee Related CA2320669C (en) 1995-04-04 1996-04-03 Device for reading magnetic tags
CA002319237A Expired - Fee Related CA2319237C (en) 1995-04-04 1996-04-03 Magnetic markers or tags
CA002320670A Expired - Fee Related CA2320670C (en) 1995-04-04 1996-04-03 Apparatus for interrogating magnetic tags

Family Applications Before (2)

Application Number Title Priority Date Filing Date
CA002319238A Expired - Fee Related CA2319238C (en) 1995-04-04 1996-04-03 Magnetic coding of articles
CA002320669A Expired - Fee Related CA2320669C (en) 1995-04-04 1996-04-03 Device for reading magnetic tags

Family Applications After (1)

Application Number Title Priority Date Filing Date
CA002320670A Expired - Fee Related CA2320670C (en) 1995-04-04 1996-04-03 Apparatus for interrogating magnetic tags

Country Status (1)

Country Link
CA (4) CA2319238C (en)

Also Published As

Publication number Publication date
CA2320669A1 (en) 1996-10-10
CA2319237C (en) 2005-10-11
CA2319238C (en) 2005-06-07
CA2320670A1 (en) 1996-10-10
CA2320670C (en) 2005-01-04
CA2319238A1 (en) 1996-10-10
CA2320669C (en) 2005-10-04

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