Headphone or similar article

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

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D14206

Patent

active

D03177670

REFERENCES:
patent: D244037 (1977-04-01), Warner et al.
patent: 4689822 (1987-08-01), Houng
Stereo Review; Dec. 1987; p. 76; Top--AKG Model 340 headphones.
Stereo Review; Oct. 1988; p. 18; Top right--Koss Pro/450 Stereophone.

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