Keyboard with a trackball

Details Keyboard with a trackball Keyboard with a trackball

1993-12-17

1995-10-17

Nunn, Freda

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Telephone equipment

Patent

active

D03632776

REFERENCES:
patent: D338665 (1993-08-01), Riley et al.
patent: D340445 (1993-10-01), Marquardt et al.
patent: D348453 (1994-07-01), Riley et al.
Ergonomische Tastaturgestaltung (Design For An Ergonomic Keyboard).

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