Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment
Patent
1989-10-11
1991-08-13
Lucas, Susan J.
Recording, communication, or information retrieval equipment
Video or audio transmission, recording or playback equipment
Telephone equipment
Patent
active
D03190498
REFERENCES:
patent: D290694 (1987-07-01), Shimizu et al.
patent: 3525086 (1970-08-01), Lichowsky
patent: 3725883 (1973-04-01), Bennett et al.
patent: 4642715 (1987-02-01), Ende
Silverstein Steven A.
Wang James P.
International Business Machines - Corporation
Kahler Mark P.
Lucas Susan J.
Nunn Freda S.
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