Recognition device intended to order the unlocking of a...

Details Recognition device intended to order the unlocking of a... Recognition device intended to order the unlocking of a...

2006-06-20

2006-06-20

Feild, Lynn (Department: 2835)

Electrical transmission or interconnection systems

Vehicle mounted systems

Automobile

C307S010100

Reexamination Certificate

active

07064457

ABSTRACT:
A recognition device is described that is used to control the unlocking of vehicle openings and/or to authorize the start-up of the vehicle. The device includes a first emitter which, on command, can send a first user identification signal over a carrier wave having a given first frequency (ν1) to a receiver. The device also includes a second emitter which can emit at least one second user identification signal over a carrier wave having a second frequency (ν2) which is different from the first frequency such that the second signal can act as an identifier signal in the shadow zones where the first signal is not recognized.

REFERENCES:
patent: 5684337 (1997-11-01), Wallace
patent: 5804888 (1998-09-01), Murr et al.
patent: 5905431 (1999-05-01), Mueller et al.
patent: 2004/0046451 (2004-03-01), Shibagaki et al.
patent: 197 32 157 (1998-01-01), None
patent: 2 746 235 (1997-09-01), None
patent: 2 119 141 (1983-11-01), None
Patent Abstracts of Japan; publication No. 9-144,404, published on Jun. 3, 1997 (1 page).

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