Electronic control keyboard

Details Electronic control keyboard Electronic control keyboard

1989-08-22

1991-12-24

Burke, Wallace R.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Telephone equipment

Patent

active

D03226069

REFERENCES:
patent: D279381 (1985-06-01), Leung
patent: D282069 (1986-01-01), Lindhe
patent: D285201 (1986-08-01), Kim
patent: D285793 (1986-09-01), Moggridge
patent: D308668 (1990-06-01), Briscoe et al.
patent: 4244659 (1981-01-01), Malt
patent: 4522518 (1985-06-01), Schmidt
patent: 4579470 (1986-04-01), Casey
patent: 4897649 (1990-01-01), Stucki

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