Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment
Patent
1989-04-06
1991-09-10
Lucas, Susan J.
Recording, communication, or information retrieval equipment
Video or audio transmission, recording or playback equipment
Telephone equipment
Patent
active
D03198251
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Landis & Gyr Communications (U.K.) Ltd.
Lucas Susan J.
Nunn Freda S.
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