Combined trackball and mouse

Details Combined trackball and mouse Combined trackball and mouse

1985-01-14

1987-08-11

Feifer, Melvin B.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Telephone equipment

D21 48, D13 32

Patent

active

D02913186

REFERENCES:
patent: D272921 (1984-03-01), Kim
patent: D281776 (1985-12-01), Griffin
patent: D284983 (1986-08-01), Liu
Computer Design, Jun., 1980, p. 21, Trackball.

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