Keyboard

Details Keyboard Keyboard

1984-02-21

1987-01-20

Lucas, Susan J.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Telephone equipment

D18 12

Patent

active

D02878542

REFERENCES:
patent: 4201489 (1980-03-01), Zapp
patent: 4333097 (1982-06-01), Buric et al.
IBM Technical Disclosure Bulletin, vol. 18, No. 12, 5-1976, p. 4187 Digital X" Typewriter Keyboard.
IBM Technical Disclosure Bulletin, vol. 22, No. 6, 11-1979, p. 2352, One-hand Tactile Data Transmitter.

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