Portable radio telephone having power saver

Details Portable radio telephone having power saver Portable radio telephone having power saver

1987-07-23

1990-02-20

Lev, Robert

Telecommunications

Transmitter and receiver at separate stations

379 59, 379 63, 455127, 455343, H04B 116

Patent

active

049033190

ABSTRACT:
A battery-powered portable radio telephone for use in a mobile telephone network receives signals from the network and judges from the received signal whether the radio telephone is inside or outside of the service area of the network. A battery saver is provided to periodically interrupt the battery power of the telephone when the latter is judged as being outside of the service area.

REFERENCES:
patent: 3962553 (1976-06-01), Lider et al.
patent: 4449248 (1984-05-01), Leslie et al.
patent: 4523332 (1985-06-01), Mori
patent: 4631496 (1986-12-01), Borras et al.
patent: 4731814 (1988-03-01), Becker et al.
patent: 4736461 (1988-04-01), Kawasaki et al.

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