Ceiling speaker

Details Ceiling speaker Ceiling speaker

1977-11-22

1980-06-03

Ansher, Bernard

Recording, communication, or information retrieval equipment

Computer, data processor equipment

181150, D26 74, D1401

Patent

active

D02552345

REFERENCES:
patent: D238185 (1975-12-01), Wellward
patent: D247562 (1978-03-01), Walker
patent: 4032725 (1977-06-01), McGee
Sterling Lighting Fixtures, Cat. 99, .COPYRGT. 1972, p. 57, "Contrator", Recessed Square Lighting Fixture.

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