GB2212445B - Data carriers - Google Patents

Data carriers

Info

Publication number
GB2212445B
GB2212445B GB8826754A GB8826754A GB2212445B GB 2212445 B GB2212445 B GB 2212445B GB 8826754 A GB8826754 A GB 8826754A GB 8826754 A GB8826754 A GB 8826754A GB 2212445 B GB2212445 B GB 2212445B
Authority
GB
United Kingdom
Prior art keywords
data carriers
carriers
data
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.)
Expired - Fee Related
Application number
GB8826754A
Other versions
GB2212445A (en
GB8826754D0 (en
Inventor
Kenneth John Drinkwater
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.)
Chubb Electronics Ltd
Original Assignee
Chubb Electronics Ltd
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
Application filed by Chubb Electronics Ltd filed Critical Chubb Electronics Ltd
Publication of GB8826754D0 publication Critical patent/GB8826754D0/en
Publication of GB2212445A publication Critical patent/GB2212445A/en
Application granted granted Critical
Publication of GB2212445B publication Critical patent/GB2212445B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/08—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means
    • G06K19/10—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards
    • G06K19/16—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards the marking being a hologram or diffraction grating
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/04—Processes or apparatus for producing holograms
    • G03H1/0402—Recording geometries or arrangements
    • G03H1/0408—Total internal reflection [TIR] holograms, e.g. edge lit or substrate mode holograms
GB8826754A 1987-11-17 1988-11-16 Data carriers Expired - Fee Related GB2212445B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB878726883A GB8726883D0 (en) 1987-11-17 1987-11-17 Data carriers

Publications (3)

Publication Number Publication Date
GB8826754D0 GB8826754D0 (en) 1988-12-21
GB2212445A GB2212445A (en) 1989-07-26
GB2212445B true GB2212445B (en) 1991-09-18

Family

ID=10627089

Family Applications (2)

Application Number Title Priority Date Filing Date
GB878726883A Pending GB8726883D0 (en) 1987-11-17 1987-11-17 Data carriers
GB8826754A Expired - Fee Related GB2212445B (en) 1987-11-17 1988-11-16 Data carriers

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB878726883A Pending GB8726883D0 (en) 1987-11-17 1987-11-17 Data carriers

Country Status (1)

Country Link
GB (2) GB8726883D0 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2561186B2 (en) * 1991-09-11 1996-12-04 日本発条株式会社 Object identification structure
US5412195A (en) * 1992-12-29 1995-05-02 Hughes Aircraft Company High security spectral code strip
AU685830B2 (en) * 1993-10-06 1998-01-29 3M Australia Pty Limited Security reader for automatic detection of tampering and alteration
US6019287A (en) 1993-10-06 2000-02-01 3M Innovative Properties Company Security reader for automatic detection of tampering and alteration
US5591527A (en) * 1994-11-02 1997-01-07 Minnesota Mining And Manufacturing Company Optical security articles and methods for making same
GB0015871D0 (en) 2000-06-28 2000-08-23 Rue De Int Ltd A security device
GB0030675D0 (en) 2000-12-15 2001-01-31 Rue De Int Ltd Methods of creating high efficiency diffuse back-reflectors based on embossed surface relief

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3887742A (en) * 1972-04-13 1975-06-03 Richard E Reinnagel Copy resistant documents

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3887742A (en) * 1972-04-13 1975-06-03 Richard E Reinnagel Copy resistant documents

Also Published As

Publication number Publication date
GB8726883D0 (en) 1987-12-23
GB2212445A (en) 1989-07-26
GB8826754D0 (en) 1988-12-21

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19921116