Headband radiophone combination set

Details Headband radiophone combination set Headband radiophone combination set

1989-10-23

1990-05-29

Lev, Robert

Telephonic communications

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

Including fiber optic link within telephone network

455 90, 379430, 379 61, 381 74, H01Q 704

Patent

active

049301489

ABSTRACT:
A headband radiophone combination set uses a control circuit and a receiver-transmitter circuit to reciprocally transmit or receive signal through an antenna to communicate with the antenna and the receiver-transmitter circuit of a main switching unit for internal, external and regular alternative telecommunication.

REFERENCES:
patent: 4340972 (1982-02-01), Heist
patent: 4357711 (1982-11-01), Drefko et al.
patent: 4392243 (1983-07-01), Ohhashi et al.
patent: 4412106 (1983-10-01), Pavel
patent: 4484029 (1984-11-01), Kenny
patent: 4591661 (1986-05-01), Benedetto et al.
patent: 4621372 (1986-11-01), Relyea
patent: 4654883 (1987-03-01), Iwata
patent: 4682363 (1987-07-01), Goldfarb et al.
patent: 4833726 (1989-05-01), Shinoda et al.
patent: 4845751 (1989-07-01), Schwab

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