Cup for an acoustical coupler

Details Cup for an acoustical coupler Cup for an acoustical coupler

1983-01-10

1985-12-10

Burke, Wallace R.

Recording, communication, or information retrieval equipment

Computer, data processor equipment

D14 59

Patent

active

D02816881

REFERENCES:
patent: 2209327 (1940-07-01), D'Humy et al.
patent: 2342087 (1944-02-01), Pridham
patent: 2478783 (1949-08-01), Scher
patent: 3012108 (1961-12-01), Bell
patent: 3725584 (1973-03-01), Kilmer et al.
patent: 3733437 (1973-05-01), Keith
patent: 4071717 (1978-01-01), Fidi et al.
patent: 4149033 (1979-04-01), Costello et al.
patent: 4158106 (1979-06-01), Mason
patent: 4246444 (1981-01-01), Mason

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