Sound concentrating and directing horn attachment for loudspeake

Details Sound concentrating and directing horn attachment for loudspeake Sound concentrating and directing horn attachment for loudspeake

1991-01-09

1993-08-17

Ansher, Bernard

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Speaker or housing therefor

Patent

active

D03384675

REFERENCES:
patent: D92962 (1934-08-01), Holtz
patent: D92963 (1934-08-01), Holtz
patent: D068985 (1925-12-01), Polydoroff
patent: D126873 (1941-04-01), O'Neil et al.
patent: D329237 (1992-09-01), Ishikawa
patent: 896672 (1908-08-01), Terhune
patent: 1825166 (1931-09-01), Sullivan
patent: 1930915 (1933-10-01), Wente
patent: 3866710 (1975-02-01), Cesati
patent: 5103482 (1992-04-01), Fabri-Conti

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