Keyless entry function expander
US5828316A · kind A · utility
16Cited by
4References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 12, 1995 |
| Grant date | Oct 27, 1998 |
| Priority date | — |
| Expiry date | May 12, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T70/5978
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An add-on, or after-market, remote-control vehicle security system expander allows auxiliary remote-control functions to be added to previously-installed remote-control systems. Using complementary remote control functions for multiple actuation encoding permits auxiliary function codes to be transmitted without a change of state in the underlying function. Signal validation by coincidence timing and voltage comparison are used to prevent inadvertent local actuation of the auxiliary remote-control functions. Decoding is also limited to a time-window to reduce electrical interference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.