Central casing unit for associated telephone sets of an intercom

Details Central casing unit for associated telephone sets of an intercom Central casing unit for associated telephone sets of an intercom

1983-07-26

1986-07-29

Largen, James R.

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D14 60

Patent

active

D02848546

REFERENCES:
patent: D207847 (1967-06-01), Darling, Jr.
patent: D231468 (1974-04-01), Krist
patent: D239838 (1976-05-01), Crimmins
patent: D247708 (1978-04-01), Furst et al.
patent: D255118 (1980-05-01), Van Horn et al.
patent: D259422 (1981-06-01), Taylor
patent: D263474 (1982-03-01), Tokiyama
patent: D266162 (1982-09-01), Martinez
patent: D276998 (1985-01-01), Caven

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