Trackball

Details Trackball Trackball

1984-11-16

1987-04-14

Feifer, Melvin B.

Games, toys, and sports goods

Toy

Representation or scale model

D13 32, D14114

Patent

active

D02893061

REFERENCES:
patent: 4538476 (1985-09-01), Luque
patent: 4612539 (1986-09-01), Hosogoe et al.
Computer Design, Jun. 1980, p. 21, upper right, Trackball.

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