Identification card
US4506148A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1982 |
| Grant date | Mar 19, 1985 |
| Priority date | — |
| Expiry date | Nov 4, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C9/28
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Identification card, including a card body, an integrated semiconductor circuit being mechanically inserted and protected in the card body for storing data to be read-out and read-in in changed form, a receiving antenna device, a rectifier circuit connected to the receiving antenna device, a filter circuit connected between the rectifier circuit and the integrated semiconductor circuit. The rectifier and filter circuits generate a supply voltage for the integrated semiconductor circuit from an energy field, a microwave transmitting antenna connected to the integrated semiconductor circuit, and a transmitter connected to the transmitting antenna.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.