Acoustical transformer for coupling sound waves from the diaphra

Details Acoustical transformer for coupling sound waves from the diaphra Acoustical transformer for coupling sound waves from the diaphra

1976-09-23

1978-09-19

Ansher, Bernard

Recording, communication, or information retrieval equipment

Computer, data processor equipment

181159, D1401, D1499

Patent

active

D02495090

REFERENCES:
patent: 2037187 (1936-04-01), Wente
patent: 2183528 (1939-12-01), Blackburn
patent: 2858377 (1958-10-01), Levy
patent: 2942071 (1960-06-01), Witchey
patent: 3852529 (1974-12-01), Schafft

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