Security system
US6683527B1 · kind B1 · utility
9Cited by
3References
33Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 12, 2001 |
| Grant date | Jan 27, 2004 |
| Priority date | — |
| Expiry date | Feb 12, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C2009/00793
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A security system which is suitable for use in a vehicle. The security system is a passive entry and passive re-mobilization system in which a security controller transmits a command signal LCs to a remote transponder, which replies with a LF response signal LRs. If an LF response signal is not received in response to the transmission of a command signal LCs, the security controller re-transmits the command signal, again as an LF command signal LCs. On determining that a command signal is a re-transmitted command signal, the remote transponder re-transmits the response signal as an UHF response signal URs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.