Patent US4680456A successfully refreshed from Google Patents.
US4680456A
Expired / Lapsed
US
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Data system employing wallet-size optical card
Assignee: LaserCard Corp
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Filing: 1985-08-06
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Granted: 1987-07-14
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Expires: 2005-08-06
Abstract
Abstract A data card having an optical, high resolution erasable or non-erasable laser recording material adhering to it. The strip of laser recording material has a capacity for recording at least 250,000 data bits represented by optically contrasting spots having a dimension of less than 25 microns. The optical contrast of the spots with respect to the surrounding field is at least two to one. The strip may have a preinscribed formatting pattern for positioning, timing, programming and related functions.
Inventors
- 👤 Jerome Drexler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:20
CPC Classifications
G; G06; G06K; G06K1/00; G06K1/12; G06K19/00; G06K19/06; G06K19/06009; G06K19/06046; G06K19/08; G06K19/10; G06K19/14; G06K7/00; G06K7/10; G06K7/14; G07; G07C; G07C9/00; G07C9/20; G07C9/22; G07C9/25; G11; G11B; G11B7/00; G11B7/002; G11B7/0033; G11B7/24; G11B7/2407; G11B7/24085; G11B7/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
191 words
A system for sequentially recording transaction data by means of a laser comprising, a wallet size card with a transparent plastic laminating material protectively bonded to a strip of erasable high resolution direct-read-after-write optically reflective read laser recording material adhered to one side of the card, being laser recordable in place on said card and having a minimal laser recording capacity of 250,000 binary bits, having laser created data spots in a surrounding optically contrasting field of said strip, representing accumulated transaction data, with a dimension of said spots being less than 25 microns, the optical reflective contrast ratio of said spots with respect to the surrounding field being at least two to one, laser means having a beam disposed in laser writing relation with respect to said strip for writing said spots, representing transaction data, the spots having a size of less than 25 microns, a light detector means disposed in reading relation with respect to said strip for reading said spots, and means for providing relative motion between the laser beams and the card for reading transaction data on the card and sequentially writing transaction data onto said card.
Claim 2
Independent Claim
191 words
A system for sequentially recording transaction data by means of a laser comprising, a wallet size card with a transparent plastic laminating material protectively bonded to a strip of erasable high resolution direct-read-after-write optically reflective read laser recording material adhered to one side of the card, being laser recordable in place on said card and having a minimal laser recording capacity of 250,000 binary bits, having laser created data spots in a surrounding optically contrasting field of said strip, representing accumulated transaction data, with a dimension of said spots being less than 25 microns, the optical reflective contrast ratio of said spots with respect to the surrounding field being at least two to one, laser means having a beam disposed in laser writing relation with respect to said strip for writing said spots, representing transaction data, the spots having a size of less than 25 microns, a light detector means disposed in reading relation with respect to said strip for reading said spots, and means for providing relative motion between the laser beams and the card for reading transaction data on the card and sequentially writing transaction data onto said card.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-13 | 1991-01-12 | 1991-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-13 | 1995-01-12 | 1995-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-13 | 1999-01-12 | 1999-07-14 | $7700.00 | Window Closed / Lapsed |