Headphones

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

Patent

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D14207

Patent

active

D03245233

REFERENCES:
patent: D131719 (1942-03-01), Kesh
patent: D181667 (1957-12-01), Oyler
patent: D240671 (1976-07-01), McTear
patent: D247433 (1978-03-01), Fixler
patent: D291197 (1987-08-01), LaLanne
patent: 4546215 (1985-10-01), Ferraro
patent: 4669129 (1987-06-01), Chance
patent: 4689822 (1987-08-01), Houng

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