Foolproof credit card
Abstract
Abstract A SELF-AUTHENTICATING CREDIT CARD DEVICE INCLUDES A PLURALITY OF DISCS ROTATABLY POSITIONED IN A CARD WITH PORTIONS PROJECTING BEYOND AN EDGE OF THE CARD SO THAT A PERSON MAY FREELY ROTATE THE DISCS WITH A THUMB OR A SINGLE FINGER. STATIONARY INDICIA MARKED ON THE CARD CORRESPONDS WITH MOVABLE INDICIA MARKED ON THE DISCS SO THAT A PREDETERMINED SECRET COMBINATION KNOWN ONLY TO AN AUTHORIZED CARD USER MAY BE ESTABLISHED WHEN THE DISCS ARE ROTATED TO ESTABLISHED THE SECRET COMBINATION THEN WIPER BLADES CARRIED BY THE DISCS ARE URGED INTO ELECTRICAL CONTACT WITH ASSOCIATED SEGMENTS OF AN ELECTRICAL CIRCUIT TO SWITCH THE ELECTRICAL CIRCUIT FROM AN INTERRUPTED CONDITION TO A CLOSED CONDITION. WHEN THE ELECTRICAL CIRCUIT IN ITS CLOSED CONDITION IS COUPLED TO A SIGNAL CIRCUIT ASSOCIATED WITH A CREDIT CARD INFORMATION RECORDING DEVICE, A SIGNAL WILL BE IMPARTED TO INDICATE THAT THE PERSON POSSESSING THE CARD IS A VALID AUTHORIZED USER.
Inventors
- 👤 Lewis George Richard
Bibliographic Details
Claims Analysis
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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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |