Battery built-in wireless ID card unit and ID verification unit

Details Battery built-in wireless ID card unit and ID verification unit Battery built-in wireless ID card unit and ID verification unit

1997-01-31

2000-01-04

Zimmerman, Brian

Communications: electrical

Continuously variable indicating

With meter reading

34082534, 34082554, 34082569, 34082572, H04Q 100

Patent

active

060114835

ABSTRACT:
A battery built-in wireless ID card unit including a magnetic field detection section which generates an electromotive force from a received magnetic field to turn on a power switch of a built-in battery, and a control section which transmits an ID code by radio after the power switch is turned on, thereby turning off the power switch.

REFERENCES:
patent: 4354189 (1982-10-01), Lemelson
patent: 4453161 (1984-06-01), Lemelson
patent: 4897644 (1990-01-01), Hirano
patent: 4926332 (1990-05-01), Komuro et al.
Keyless Entry System With Radio Card Transponder (I.E.E.E. Transactions on Industrial Electronics vol. 35, No. 2, May 1988, pp. 208-216.

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