Track ball

Details Track ball Track ball

1991-10-30

1992-12-01

Burke, Wallace R.

Recording, communication, or information retrieval equipment

Video or audio transmission, recording or playback equipment

Telephone equipment

Patent

active

D03313980

REFERENCES:
patent: D272921 (1984-03-01), Kim
patent: D289306 (1987-04-01), Burnstein et al.
patent: D326261 (1992-05-01), Ashmun et al.
patent: 4538476 (1985-09-01), Lugue
patent: 4862165 (1989-08-01), Gast
patent: 4952919 (1990-08-01), Nippoldt
Businessland catalog item Kensington Turbo Mouse, p. 22, 1988.

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