Keyless entry system

Details Keyless entry system Keyless entry system

1991-01-14

1993-04-20

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

34082531, H04B 500

Patent

active

052046729

ABSTRACT:
A keyless entry system is provided for locked or disabled items. A transmitter carried by a person generates a signal with a predetermined frequency characteristic such that the generated signal is transmitted through the carrier's body. There is a receiver apparatus including a detector for detecting a signal with the predetermined frequency characteristic and a mechanism that is engageable by the carrier's body for providing signals transmitted through the body to the detector. When such signals are detected, a circuit is activated to unlock or enable the item. An alarm system may be provided which sounds under certain predetermined conditions and a latching mechanism may be utilized to disarm the alarm under certain conditions.

REFERENCES:
patent: 4354189 (1982-10-01), Lemelson
patent: 4479110 (1984-10-01), Cipri
patent: 4794268 (1988-12-01), Nakano et al.
patent: 4819050 (1989-04-01), Manzoni
patent: 4835533 (1989-05-01), Akutsu
patent: 4897644 (1990-01-01), Hirano

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