Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment
Patent
1987-12-24
1990-08-21
Lucas, Susan J.
Recording, communication, or information retrieval equipment
Video or audio transmission, recording or playback equipment
Telephone equipment
Patent
active
D03100685
REFERENCES:
patent: 2912066 (1959-11-01), Ellithorpe
patent: 3578905 (1971-05-01), Anders et al.
patent: 4576578 (1986-03-01), Parker et al.
patent: 4669789 (1987-06-01), Pemberton
patent: 4681378 (1987-07-01), Hellman
patent: 4696522 (1987-09-01), Lowe
patent: 4725106 (1988-02-01), Shields et al.
Lucas Susan J.
Nunn Freda S.
SYSTEC Gesellschaft fur Digital-Analog-Technik mbH
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