US4175775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Access control system
Assignee: VISUAL METHODS Inc
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Filing: 1978-01-11
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Granted: 1979-11-27
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Expires: 1998-01-11
Abstract
Abstract A photo I.D. card having the photograph, and/or signature, and/or coded indicia of an authorized holder which is visible under ordinary room illumination also carries a second photograph of the user. The second photograph is in the form of a transparency which is sandwiched between a piece of retroflective material and an optical filter which is opaque to light of normal intensity and wavelength but which is transparent to infra-red or ultra-violet radiation. Also disclosed is apparatus for reading both the visible and invisible photographs, signature, and data on the card by means of a CCTV system. Any attempt to alter or forge the I.D. card can, thus, be readily detected.
Inventors
- 👤 Herman Kruegle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:15
CPC Classifications
G; G06; G06K; G06K19/00; G06K19/06; G06K19/08; G06K19/10; G06K19/14; G07; G07C; G07C9/00; G07C9/20; G07C9/22; G07F; G07F7/00; G07F7/08; G07F7/086; Y; Y10; Y10S; Y10S283/00; Y10S283/901
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
95 words
An improved identification card of the type that includes a first region bearing visible indicia descriptive of the authorized holder of the card, wherein the improvement comprises: a second region of said card bearing further visible indicia descriptive of said holder, said further visible indicia being recorded on a photographic transparency; and means for inhibiting detection of said further visible indicia when said card is illuminated by visible radiation of normal intensity and wavelength, said inhibiting means comprising: a reflecting medium downstream of said photographic transparency; and an optical filter upstream of said photographic transparency.
Claim 2
Dependent Claim
95 words
An improved identification card of the type that includes a first region bearing visible indicia descriptive of the authorized holder of the card, wherein the improvement comprises: a second region of said card bearing further visible indicia descriptive of said holder, said further visible indicia being recorded on a photographic transparency; and means for inhibiting detection of said further visible indicia when said card is illuminated by visible radiation of normal intensity and wavelength, said inhibiting means comprising: a reflecting medium downstream of said photographic transparency; and an optical filter upstream of said photographic transparency.
Claim 3
Dependent Claim
14 words
The identification card according to claim 1 wherein said reflecting medium comprises a mirror.
Claim 4
Dependent Claim
15 words
The identification card according to claim 1 wherein said reflecting medium comprises a retroflective medium.
Claim 5
Dependent Claim
22 words
The identification card according to claim 1 wherein said filter comprises a partially-silvered mirror having substantially total reflection and only minimal transmittance.
Claim 6
Dependent Claim
24 words
The identification card according to claim 1 wherein said filter is substantially opaque to visible radiation but substantially transparent to infra-red or ultra-violet radiation.
Claim 7
Dependent Claim
35 words
The identification card according to claim 1 wherein said filter includes a polarizing element having a plane of polarization which is oriented in a predetermined direction with respect to the principal axis of said card.
Claim 8
Dependent Claim
123 words
An identification card which comprises, in order: a first, transparent, protective member; a second member comprising a first region bearing a photographic likeness of the authorized holder of said card and a second region comprising a filter substantially opaque to visible radiation but substantially transparent to infra-red or ultra-violet radiation; a third member including a first region substantially aligning with the second region of said second member, said first region comprising a photographic transparency bearing an image of the identical authorized holder depicted in the likeness of the first region of said second member; a fourth member including a retroflective region substantially aligning with the first region of said third member; and a fifth member for rigidly supporting said first through fourth members.
Claim 9
Dependent Claim
123 words
An identification card which comprises, in order: a first, transparent, protective member; a second member comprising a first region bearing a photographic likeness of the authorized holder of said card and a second region comprising a filter substantially opaque to visible radiation but substantially transparent to infra-red or ultra-violet radiation; a third member including a first region substantially aligning with the second region of said second member, said first region comprising a photographic transparency bearing an image of the identical authorized holder depicted in the likeness of the first region of said second member; a fourth member including a retroflective region substantially aligning with the first region of said third member; and a fifth member for rigidly supporting said first through fourth members.
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) | 1982-11-26 | 1983-05-28 | 1983-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-26 | 1987-05-28 | 1987-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-26 | 1991-05-28 | 1991-11-27 | $7700.00 | Window Closed / Lapsed |