3-D audio headset

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

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Patent

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D03581519

REFERENCES:
patent: D284080 (1986-06-01), Swezey et al.
patent: D351622 (1994-10-01), Holmes
patent: 3949490 (1976-04-01), Derderian et al.
patent: 4727599 (1988-02-01), Rappaport et al.

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