Driver key car identifying system
US4555619A · kind A · utility
38Cited by
6References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 19, 1983 |
| Grant date | Nov 26, 1985 |
| Priority date | — |
| Expiry date | May 19, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C9/20
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A key card receiver is mounted in the cab of a truck. The driver inserts a card with a power-in contact shorted to several data output contacts. A power-out contact provides power to the receiver to operate three sequentially connected integrated circuits and another integrated circuit for pulsing the three serially connected circuits to convert concurrent binary data of shorted or open conductors on the driver card to a sequential data signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.