Acoustic coupler

Details Acoustic coupler Acoustic coupler

1979-10-09

1982-08-31

Ansher, Bernard

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D14101, D1403

Patent

active

D02659921

REFERENCES:
patent: D212692 (1968-11-01), Plantholt
patent: D219454 (1970-12-01), Silten
patent: D220269 (1971-03-01), Jacobs et al.
patent: D255235 (1980-06-01), Kepford
patent: 3426150 (1969-02-01), Tygart

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