Identification card including optically powered electronic circuit
US4742573A · kind A · utility
32Cited by
10References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 25, 1985 |
| Grant date | May 3, 1988 |
| Priority date | — |
| Expiry date | Apr 25, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C9/28
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A card, such as a credit card or identification card, includes electronic circuitry which permits its identification by an identifying device. More particularly, optical radiation is transmitted from the identifying device to the card to be identified. The radiation is modulated with information by a modulating device included in the card and is retransmitted to the identifying device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.