Communication aid

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Magnetic recorder or player

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D14167

Patent

active

D03666573

REFERENCES:
patent: D205022 (1989-12-01), Hallgren et al.
patent: D292283 (1987-10-01), Matsuda et al.
patent: D295173 (1988-04-01), Oren
patent: D306589 (1990-03-01), Murayama
patent: D324544 (1992-03-01), Duh
patent: D341592 (1993-11-01), Queen
patent: D346598 (1994-05-01), McCay et al.
patent: D346602 (1994-05-01), Robertson

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