US4171766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Falsification-proof identification card having a Lippmann-Bragg hologram
Assignee: Siemens AG
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Filing: 1977-02-22
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Granted: 1979-10-23
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Expires: 1997-02-22
Abstract
Abstract An identification card with a holographic security safeguard in the form of a large area Lippmann-Bragg hologram recorded on a layer or sheet-like carrier disposed on a face of the identification card, capable of being read out without the use of laser light, employing merely normal light sources which produce incoherent light, whereby an image can be observed with the naked eye, and which can contain both binary and analog information, comparable, for example, with printed and other information contained on the identification card; and a method of producing such a card.
Inventors
- 👤 Hartwig Ruell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:26
CPC Classifications
B; B42; B42D; B42D25/00; B42D25/30; B42D25/328; B42D25/20; B42D25/23; B42D25/40; B42D25/405; G; G03; G03H; G03H1/00; G03H1/0005; G03H1/0011; G03H1/02; G03H1/024; G03H1/0248; G03H1/04; G03H1/0402; G03H1/0406; G03H1/26; G03H1/28; G06; G06K; G06K19/00; G06K19/06; G06K19/08; G06K19/10; G06K19/16; G07; G07F; G07F7/00; G07F7/08; G07F7/086; B42D2033/10; B42D2033/28; B42D2035/02; B42D2035/06; B42D2035/08; B42D2035/34; B42D2035/50; B42D25/318; G03H2001/0415; G03H2001/0428; G03H2210/00; G03H2210/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
67 words
An identification card with conventional, particularly printed information and with a holographic security safeguard, comprising a card body, at least one side of which is provided with a layer-like carrier and a Lippmann-Bragg hologram carried by said carrier, which hologram generally covers the entire rear face of the identification card body and contains items of security information, the front face of said card containing conventional identification information.
Claim 2
Dependent Claim
67 words
An identification card with conventional, particularly printed information and with a holographic security safeguard, comprising a card body, at least one side of which is provided with a layer-like carrier and a Lippmann-Bragg hologram carried by said carrier, which hologram generally covers the entire rear face of the identification card body and contains items of security information, the front face of said card containing conventional identification information.
Claim 3
Dependent Claim
19 words
An identification card according to claim 1, wherein both analogue and binary information are recorded in the Lippmann-Bragg hologram.
Claim 4
Dependent Claim
30 words
An identification card according to claim 2, wherein the holographically recorded items of analogue information are identical with at least a portion of the conventional information carried by the card.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-22 | 1983-04-23 | 1983-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-22 | 1987-04-23 | 1987-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-22 | 1991-04-23 | 1991-10-23 | $7700.00 | Window Closed / Lapsed |