Keyboard

Details Keyboard Keyboard

1986-01-30

1989-07-18

Lucas, Susan J.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Telephone equipment

Patent

active

D03022706

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patent: 4307391 (1981-12-01), Lewis
patent: 4633227 (1986-12-01), Menn

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