Vehicle security system upgrade
US5850174A · kind A · utility
21Cited by
20References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1996 |
| Grant date | Dec 15, 1998 |
| Priority date | — |
| Expiry date | Oct 30, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R2325/304
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An upgrade method and apparatus for both remote and key-operated two-step vehicle security systems is disclosed. The upgrade blocks attempts to disarm the alarm circuit when the vehicle is armed and unlocked improperly. The upgrade can be added to existing systems regardless of the polarity of the signals used therein. Improved power-up and remote control features can also be added as a part of the upgrade.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.