Top surface of a keypad

Details Top surface of a keypad Top surface of a keypad

1994-09-22

1996-06-18

Nunn, Freda

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Telephone equipment

Patent

active

D03708993

REFERENCES:
patent: 4543631 (1985-09-01), Kurosu et al.
patent: 5197810 (1993-03-01), Zhang et al.
IBM Technical Disclosure Bulletin vol. 29 No. 12 May 1987 pp. 5383-5384.

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