Head phone

Details Head phone Head phone

1975-12-10

1977-11-01

Ansher, Bernard

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D1403

Patent

active

D02462591

REFERENCES:
patent: D223256 (1972-04-01), Thomson
patent: 3488457 (1970-01-01), Lahti
patent: 3512088 (1970-05-01), Ross
patent: 3902120 (1975-08-01), Dascal et al.

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