Dual function radio frequency remote control system for a motor vehicle
US6512462B1 · kind B1 · utility
10Cited by
3References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 25, 1997 |
| Grant date | Jan 28, 2003 |
| Priority date | — |
| Expiry date | Sep 25, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C2209/63
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A dual function radio frequency remote control system has a dual function portable emitter, and a receiver carried on a motor vehicle. The signal emitted by the emitter contains a function code in at least two parts at different power levels, and the receiver is adapted to control at least two functions of the vehicle selectively according to the power level of the received signal. If the receiver identifies both parts of the function code, the doors are unlocked. If only one part is received the doors are not unlocked, but the courtesy light or flashing indicators are switched on to enable the vehicle to be located.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.