Numerical keyboard for notebook computer

Details Numerical keyboard for notebook computer Numerical keyboard for notebook computer

1990-09-18

1992-09-29

Burke, Wallace R.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Telephone equipment

Patent

active

D03298485

REFERENCES:
patent: D280406 (1985-09-01), Walker
patent: D289396 (1987-04-01), Wilson et al.
patent: D292404 (1987-10-01), Wilson et al.
patent: D307888 (1990-05-01), Ishida
patent: 4004672 (1977-01-01), Hirano et al.
patent: 4142236 (1979-02-01), Martz et al.
Sharp PC-6220 Notebook Computer, undated.

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