Loudspeaker

Details Loudspeaker Loudspeaker

1987-07-01

1990-01-23

Bullock, B. J.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Speaker or housing therefor

Patent

active

D03056600

REFERENCES:
patent: D217154 (1970-04-01), Boldt et al.
patent: D223255 (1972-04-01), Boldt et al.
patent: D247490 (1978-03-01), Everidge
patent: D281316 (1985-11-01), Gary
patent: D288560 (1987-03-01), Anderson
patent: 1213732 (1917-01-01), Bossu
patent: 1777283 (1930-10-01), Cosgrave
patent: 1960258 (1934-05-01), Williams
patent: 2820525 (1958-01-01), Fountain et al.
patent: 3153783 (1964-10-01), Whitehead
patent: 4039044 (1977-08-01), Heil
patent: 4200170 (1980-04-01), Williams, Jr.
Elektrotechnische Zeitschrift 8/8/34, vol. 32, p. 787.

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