US4119361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayer identification card
Assignee: Landis and Gyr AG
•
Filing: 1976-08-09
•
Granted: 1978-10-10
•
Expires: 1996-08-09
Abstract
Abstract A multi-ply identification card for storage of machine-readable information includes optical markings disposed between protective layers. At least one of the protective layers can be penetrated by infrared light, and both are opaque to light of lesser wavelengths. The optical markings have a fine structure with at least 300 lines per mm and the protective layers are so connected to the optical markings that the markings are destroyed if one of the protective layers is removed.
Inventors
- 👤 David Leslie Greenaway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:57
CPC Classifications
G; G06; G06K; G06K19/00; G06K19/06; G06K19/08; G06K19/10; G06K19/16; B; B42; B42D; B42D25/00; B42D25/40; B42D25/45; G06K19/14; G07; G07D; G07D7/00; G07D7/06; G07D7/12; G03; G03H; G03H1/00; G03H1/02; G03H1/0236; G03H1/22; G03H1/2286; G03H1/2202; G03H2001/2223; G03H2001/2231; G03H2001/2234; G03H2222/00; G03H2222/10; G03H2222/16; G03H2250/00; G03H2250/34; Y; Y10; Y10S; Y10S283/00; Y10S283/901
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
131 words
A card for storing information for optical reading comprising: optical marking means indicative of said information; a protective layer on each side of said optical marking means, both of said layers being opaque to light of shorter wavelength than infrared light and at least one of said protective layers being penetratable by infrared light; said optical marking means being provided at the inner face of one of said protective layers and having a cellular surface structure with at least 300 lines per mm to inhibit photographic copying of said information with the use of infrared light; and said protective layers being so connected to said optical marking means that removal of either of said protective layers therefrom will destroy said optical marking means to inhibit copying or viewing of said information.
Claim 2
Dependent Claim
131 words
A card for storing information for optical reading comprising: optical marking means indicative of said information; a protective layer on each side of said optical marking means, both of said layers being opaque to light of shorter wavelength than infrared light and at least one of said protective layers being penetratable by infrared light; said optical marking means being provided at the inner face of one of said protective layers and having a cellular surface structure with at least 300 lines per mm to inhibit photographic copying of said information with the use of infrared light; and said protective layers being so connected to said optical marking means that removal of either of said protective layers therefrom will destroy said optical marking means to inhibit copying or viewing of said information.
Claim 3
Dependent Claim
138 words
A card for storing information for optical reading comprising: an information layer including optical marking means indicative of said information; a protective layer on each side of said information layer, at least one of said protective layers being penetratable by infrared light and opaque to light of shorter wavelength than infrared light; a layer reflective to infrared light on the side of said information layer opposite said at least one protective layer; the markings of said optical marking means being formed of a line structure with at least 300 lines per mm to inhibit photographic copying of said information with the use of infrared light; said protective layers being so attached with said information layer that removal of either of said protective layers therefrom will destroy said optical marking means to inhibit viewing or copying of said information.
Claim 4
Dependent Claim
138 words
A card for storing information for optical reading comprising: an information layer including optical marking means indicative of said information; a protective layer on each side of said information layer, at least one of said protective layers being penetratable by infrared light and opaque to light of shorter wavelength than infrared light; a layer reflective to infrared light on the side of said information layer opposite said at least one protective layer; the markings of said optical marking means being formed of a line structure with at least 300 lines per mm to inhibit photographic copying of said information with the use of infrared light; said protective layers being so attached with said information layer that removal of either of said protective layers therefrom will destroy said optical marking means to inhibit viewing or copying of said information.
Claim 5
Dependent Claim
45 words
A card as recited in claim 2 wherein a porous reflective layer is interposed between said information layer and one of said protective layers, said one of said protective layers being bonded to said information layer by way of the pores of said reflective layer.
Claim 6
Dependent Claim
141 words
A card for storing information for optical reading comprising: a first protective layer of plastic material; optical marking means indicative of said information impressed at one side of said first protective layer, said optical marking means having a structure with at least 300 lines per mm to inhibit photographic copying of said information with the use of infrared light; a metal reflective layer covering said optical marking means; a second protective layer; and means chemically bonding said one side of said first protective layer, said reflective layer, and one side of said second protective layer together in such manner that said optical marking means will be destroyed if said protective layers are separated to inhibit viewing or copying of said information; and said first protective layer being penetratable by infrared light and opaque to light of shorter wavelength than infrared light.
Claim 7
Dependent Claim
141 words
A card for storing information for optical reading comprising: a first protective layer of plastic material; optical marking means indicative of said information impressed at one side of said first protective layer, said optical marking means having a structure with at least 300 lines per mm to inhibit photographic copying of said information with the use of infrared light; a metal reflective layer covering said optical marking means; a second protective layer; and means chemically bonding said one side of said first protective layer, said reflective layer, and one side of said second protective layer together in such manner that said optical marking means will be destroyed if said protective layers are separated to inhibit viewing or copying of said information; and said first protective layer being penetratable by infrared light and opaque to light of shorter wavelength than infrared light.
Claim 8
Dependent Claim
127 words
A card for storing information for optical reading comprising: first and second protective layers joined together; one said protective layer having an inner face of cellular surface structure with alternate punctiform contact zones and recesses, both of said protective layers being opaque to light of shorter wavelength than infrared light and at least one of said layers being penetratable by infrared light; optical marking means indicative of said information disposed at the surface of one of said protective layers adjacent a surface of said other protective layer at locations corresponding to at least some of said punctiform contact zones or recesses, said optical means having a structure with at least 300 lines per mm to inhibit photographic copying of said information with the use of infrared light.
Claim 9
Dependent Claim
127 words
A card for storing information for optical reading comprising: first and second protective layers joined together; one said protective layer having an inner face of cellular surface structure with alternate punctiform contact zones and recesses, both of said protective layers being opaque to light of shorter wavelength than infrared light and at least one of said layers being penetratable by infrared light; optical marking means indicative of said information disposed at the surface of one of said protective layers adjacent a surface of said other protective layer at locations corresponding to at least some of said punctiform contact zones or recesses, said optical means having a structure with at least 300 lines per mm to inhibit photographic copying of said information with the use of infrared light.
Claim 10
Dependent Claim
123 words
A card for storing information for optical reading comprising: first and second protective layers joined together; one of said protective layers having a substantially planar inner surface and the other of said protective layers having an inner surface structue with alternate punctiform contact zones and recesses, both of said protective layers being opaque to light of shorter wavelength than infrared light and at least one of said protective layers being penetratable by infrared light; and optical marking means indicative of said information disposed in said recesses in the inner surface of said other of said protective layers, said optical means having a structure with at least 300 lines per mm to inhibit photographic copying of said information with the use of infrared light.
Claim 11
Dependent Claim
123 words
A card for storing information for optical reading comprising: first and second protective layers joined together; one of said protective layers having a substantially planar inner surface and the other of said protective layers having an inner surface structue with alternate punctiform contact zones and recesses, both of said protective layers being opaque to light of shorter wavelength than infrared light and at least one of said protective layers being penetratable by infrared light; and optical marking means indicative of said information disposed in said recesses in the inner surface of said other of said protective layers, said optical means having a structure with at least 300 lines per mm to inhibit photographic copying of said information with the use of infrared light.
References Cited (Backward Citations)
US3620590A
Cited
US3732640A
Cited
US3894756A
Cited
US3919447A
Cited
US3802101A
Cited
US3869301A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-09 | 1982-04-10 | 1982-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-09 | 1986-04-10 | 1986-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-09 | 1990-04-10 | 1990-10-10 | $7700.00 | Window Closed / Lapsed |