Auxiliary keypad

Details Auxiliary keypad Auxiliary keypad

1990-11-05

1993-07-06

Burke, Wallace R.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Telephone equipment

Patent

active

D03371069

REFERENCES:
patent: D249822 (1978-10-01), Ohie et al.
patent: D255125 (1980-05-01), Hazama et al.
patent: D321865 (1991-11-01), Derocher
patent: 4229726 (1980-10-01), Deaton et al.
At Magazine . Feb. 1985 p. 149 . Trackhouse Keypad.
Information Week . Jan. 28, 1985 . p. 65 . Compact low profile keyboard (right side).

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