Communications: electrical – Land vehicle alarms or indicators – Of burglary or unauthorized use
Patent
1994-06-27
1995-10-17
Swarthout, Brent
Communications: electrical
Land vehicle alarms or indicators
Of burglary or unauthorized use
180287, 307 102, B60R 2510
Patent
active
054594480
ABSTRACT:
An automotive security device of the type consisting of: (a) a portable unit and (b) a central unit. The portable unit consisting of a transmitter circuit and a pulse duration circuit being capable of transmitting specified signal pulses at periodic intervals over a limited distance. The central unit, which is mounted in the vehicle, consisting of a receiver circuit and an interface circuit being capable of receiving these signals and activating the vehicle electrical system upon receiving said signal and deactivating the vehicle electrical system upon the absence of said signal.
REFERENCES:
patent: 4754255 (1988-06-01), Sanders et al.
patent: 4835518 (1989-05-01), Hwang
patent: 4924206 (1990-05-01), Ayers
patent: 4931664 (1990-06-01), Knoll
patent: 5280267 (1994-01-01), Reggiani
patent: 5349329 (1994-09-01), Smith
Dortenzio Christopher J.
Twohig Brian H.
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