Long range wireless alarm monitoring system
US4511887A · kind A · utility
51Cited by
6References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 13, 1984 |
| Grant date | Apr 16, 1985 |
| Priority date | — |
| Expiry date | Feb 13, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B25/10
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A security system using a remote sensing unit and a transponder in either one-way or two-way radio communication with a central station. The security system provides for the continuous monitoring of remote points in a particular area from a central station without need of physical connections between the central station and the remote points. The security system further provides the added feature of using redundant code comparison to ensure the validity of the transmitted signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.