Branched telephone system

Details Branched telephone system Branched telephone system

1988-03-02

1991-06-04

Dwyer, James

Telephonic communications

Audio message storage, retrieval, or synthesis

379 58, 379184, 379185, H04Q 704

Patent

active

050220683

ABSTRACT:
A branched telephone system having a plurality of telephones which are connected to a single subscriber line or to single radio apparatus functions to establish a priority set condition in which the communicating function of particular one of the telephones is validated to prevent the other telephones from being used, and further includes the function of automatically cancelling such a priority set condition.

REFERENCES:
patent: 3435151 (1969-03-01), Russel
patent: 4000375 (1976-12-01), Kawamura
patent: 4075434 (1978-02-01), Merritt, Jr.
patent: 4640987 (1987-02-01), Tsukada et al.
patent: 4650931 (1987-03-01), Tsukada et al.
patent: 4691338 (1987-09-01), Makino
patent: 4718080 (1988-01-01), Serrano et al.
patent: 4745632 (1988-05-01), Duffy
patent: 4747128 (1988-05-01), Chan et al.
patent: 4748685 (1988-05-01), Rozanski, Jr.

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