Loud speaker

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Speaker or housing therefor

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1401

Patent

active

D04068467

REFERENCES:
patent: D128290 (1941-07-01), Rockola
patent: D247490 (1978-03-01), Everidge
patent: D281068 (1985-10-01), Katsuno
patent: D311539 (1990-10-01), Franzini et al.
patent: D371367 (1996-07-01), Bittencourt
patent: 2288539 (1942-06-01), Morrison
patent: 3931867 (1976-01-01), Janszen

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