Keyboard

Details Keyboard Keyboard

1992-10-09

1994-04-26

Burke, Wallace R.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Telephone equipment

Patent

active

D03463770

REFERENCES:
patent: D278063 (1985-03-01), Chamberlain et al.
patent: D304451 (1989-11-01), Kagayama et al.
patent: D307748 (1990-05-01), Cardona et al.
patent: D308360 (1990-06-01), Schaum
patent: D319632 (1991-09-01), Heimburger
patent: D330199 (1992-10-01), Mendel et al.

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