Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment
Patent
1985-11-21
1987-12-15
Lucas, Susan J.
Recording, communication, or information retrieval equipment
Video or audio transmission, recording or playback equipment
Telephone equipment
Patent
active
D02932431
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IBM Keyboard-(B)-1.
Fujitsu Limited
Lucas Susan J.
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