Combination hearing protector and sound amplifier

Details Combination hearing protector and sound amplifier Combination hearing protector and sound amplifier

1992-03-23

1995-04-11

Feifer, Melvin B.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Speaker or housing therefor

Patent

active

D03572544

REFERENCES:
patent: D255352 (1980-06-01), Besasie
patent: D299025 (1988-12-01), Besasie
patent: D331928 (1992-12-01), McDowell
patent: D336647 (1993-06-01), Yamazaki
patent: 2972018 (1961-02-01), Hawley et al.
patent: 3306991 (1967-02-01), Wood
patent: 4181818 (1980-01-01), Shenier
patent: 4845751 (1989-07-01), Schwab
patent: 4928311 (1990-05-01), Trompler
patent: 5001763 (1991-03-01), Mosely
Design News, Nov. 1985, p. 122 Ear protectors.
Crutchfield Winter/Spring 91 p. 101 AKG Headphones, item G.

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