Communications: electrical – Continuously variable indicating – With meter reading
Patent
1996-10-25
1999-07-27
Zimmerman, Brian
Communications: electrical
Continuously variable indicating
With meter reading
34082531, 34082569, 34082532, 34082572, 34082544, 340435, 340426, H04Q 900
Patent
active
059297697
ABSTRACT:
A system for unlocking and/or opening an openable member of a motor vehicle comprises a control unit, transmitter/receiver means connected to said control unit, and a transponder worn or carried by a user. The transmitter/receiver means of the vehicle comprise at least one antenna situated on the openable member or in the vicinity thereof, said transmitter/receiver means entering into dialogue with the transponder only when it is situated in the immediate vicinity of said antenna. The control unit causing the openable member to be unlocked and/or opened when the transponder is presented in a predetermined sequence to the antenna(s) of the transmitter/receiver means of the vehicle.
REFERENCES:
patent: 4354189 (1982-10-01), Lemelson
patent: 4763121 (1988-08-01), Tomoda et al.
patent: 5552789 (1996-09-01), Schuermann
patent: 5635923 (1997-06-01), Steele et al.
patent: 5675490 (1997-10-01), Bachhuber
"Keyless Entry System with Radio Card Transponder", I.E.E.E. Transactions on Industrial Electronics, vol. 35, No. 2, May 1988, pp. 208-216.
Dalencourt Yves
Valeo Securite Habitacle
Zimmerman Brian
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