Remote keyless entry rolling code storage method
US6194991A · kind A · utility
13Cited by
8References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 29, 1999 |
| Grant date | Feb 27, 2001 |
| Priority date | — |
| Expiry date | Oct 29, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C2009/00984
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A remote keyless entry system stores critical data for synchronization in a plurality of memory locations at the receiver. When a transmission is received, the received data is validated using the critical data from a first memory location. In the event that the data in the first memory location is determined to be unusable, the critical data from a second memory location is used. The critical data is rewritten at the first memory location only if the transmission is ultimately determined to be valid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.