Telephone mouthpiece keyboard

Details Telephone mouthpiece keyboard Telephone mouthpiece keyboard

1976-10-08

1978-07-25

Ansher, Bernard

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D14 67, D1403

Patent

active

D02486504

REFERENCES:
patent: 2319321 (1943-05-01), Head
patent: 3659050 (1972-04-01), Carlsson et al.

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