Keypad

Details Keypad Keypad

1989-04-20

1991-04-02

Burke, Wallace R.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Telephone equipment

D14114, D14115

Patent

active

D03158969

REFERENCES:
patent: D285203 (1986-08-01), Milroy et al.
patent: D286047 (1986-10-01), Roots et al.
patent: D301233 (1989-05-01), Briscoe
patent: D309449 (1990-07-01), MacDonald et al.
patent: 4650934 (1987-03-01), Burke
patent: 4913573 (1990-04-01), Retter
patent: 4917516 (1990-04-01), Retter

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