Telephone

Details Telephone Telephone

1981-01-26

1982-11-16

Ansher, Bernard

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D21111, D1403

Patent

active

D02669269

REFERENCES:
patent: D68510 (1925-10-01), Christensen et al.
patent: D81173 (1930-05-01), Thornton
patent: D248556 (1978-07-01), Thomas
patent: D250023 (1978-10-01), Perkins et al.
patent: D254661 (1980-04-01), Fiorilla
patent: 4087650 (1978-05-01), Tucker

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