Computer trackball

Details Computer trackball Computer trackball

1996-02-09

1997-09-23

Nunn, Freda

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Telephone equipment

1402

Patent

active

D03840476

REFERENCES:
patent: D291318 (1987-08-01), Kim
patent: D302010 (1989-07-01), McLaughlin et al.
patent: D313589 (1991-01-01), Martinelli et al.
patent: D315552 (1991-03-01), Sacherman

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