Speaker

Recording – communication – or information retrieval equipment – Computer – data processor equipment

Patent

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Details

D14 34

Patent

active

D02920913

REFERENCES:
patent: D254252 (1980-02-01), Matsubara
patent: D265556 (1982-07-01), Iijima
patent: D278432 (1985-04-01), Buck
patent: D284370 (1986-06-01), O'Connor, Jr.
J. C. Whitney & Co., catalog No. 451D, p. A, top left of page.

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