Telephone set

Details Telephone set Telephone set

1986-03-10

1987-12-08

Burke, Wallace R.

Recording, communication, or information retrieval equipment

Computer, data processor equipment

Patent

active

D02931028

REFERENCES:
patent: D164491 (1951-09-01), Hansen, Jr. et al.
patent: D174989 (1955-06-01), Heller
patent: D175073 (1955-07-01), Heller
patent: D199853 (1964-12-01), Gilbert
patent: D211182 (1968-05-01), Zacharia
patent: D214628 (1969-07-01), Kahn
patent: D218172 (1970-07-01), Lawrence
patent: D232642 (1974-09-01), Beadle et al.
patent: D245602 (1977-08-01), Genaro et al.
patent: 2468721 (1949-04-01), Volkmann
Post Office Electrical Engineers' Journal (Gr. Britain), Oct. 1981; Customer Apparatus: p. 237, Model 786; 722; p. 238, Model Deltahphone.

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