Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment
Patent
1990-10-04
1992-10-20
Lucas, Susan J.
Recording, communication, or information retrieval equipment
Video or audio transmission, recording or playback equipment
Telephone equipment
D21 48
Patent
active
D03303713
REFERENCES:
patent: D287255 (1986-12-01), Watson, Jr.
patent: D306615 (1990-03-01), Hayes
patent: D317021 (1991-05-01), Shulman et al.
patent: D317950 (1991-07-01), Tse
patent: 4509383 (1985-04-01), Yeh
Lucas Susan J.
STD Electronic International LTD
Tung M. H.
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