Earmuff headphone

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

Patent

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Details

D29112, 1401

Patent

active

D03905640

REFERENCES:
patent: D149150 (1948-03-01), Schwartz
patent: D301477 (1989-06-01), Storyk
patent: D324386 (1992-03-01), Oblinger
patent: D346882 (1994-05-01), Bryerton, Sr.
patent: 2615169 (1952-10-01), Maxant
patent: 3249949 (1966-05-01), Rosenberg et al.
patent: 4546215 (1985-10-01), Ferraro

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