Listening center

Details Listening center Listening center

1975-09-17

1977-03-08

Ansher, Bernard

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D1403

Patent

active

D02436205

REFERENCES:
patent: 3155778 (1964-11-01), Meyer
patent: 3166859 (1965-01-01), Alter
patent: D219984 (1971-02-01), Scanlon
patent: D227484 (1973-06-01), Warwick et al.
patent: D227486 (1973-06-01), Warwick et al.

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