Radio telephone apparatus

Details Radio telephone apparatus Radio telephone apparatus

1988-11-23

1990-06-12

Lev, Robert

Telephonic communications

Having light wave or ultrasonic link for speech or paging...

Including fiber optic link within telephone network

379 61, 379 63, 455127, 455343, H01M 172

Patent

active

049339630

ABSTRACT:
A radio telephone apparatus power-supplied with a battery comprises a power supply control means for controlling the battery so as to terminate power supply if the apparatus is not operated for a predetermined time period. The apparatus further comprises means for informing at least a user of the termination of power supply prior to the power being turned off.

REFERENCES:
patent: 4509201 (1985-04-01), Sekigawa et al.
patent: 4521912 (1985-06-01), Franke et al.
patent: 4736461 (1988-04-01), Kawasaki et al.
patent: 4745408 (1988-05-01), Nagata et al.

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