Electronic voice annunciator

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

Patent

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Details

D14158, D10116

Patent

active

D03761487

REFERENCES:
patent: D254729 (1980-04-01), Mitumori
patent: D274048 (1984-05-01), Wong et al.
patent: D276709 (1984-12-01), Parker
patent: D353114 (1994-12-01), Tsung-Fu
patent: D366657 (1996-01-01), Hallgren et al.

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