System for limiting access to security system program
US4095739A · kind A · utility
52Cited by
3References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1977 |
| Grant date | Jun 20, 1978 |
| Priority date | — |
| Expiry date | Aug 26, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C11/00
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A security system in which access at remote locations is limited to personnel inserting in the system a coded data card, the data of which compares favorably with data stored in a memory. The memory data comprises a table which permits access to selected terminals by selected personnel at selected times. Programming access to the system for the purpose of altering data in the access authorization table is limited to individuals who insert a supervisor's card into the system, which card enables the logic required for altering the authorization table.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.