IP Library › Granted Patent US 5,345,253
Granted Patent Utility
US 5,345,253 · App. 08/184,215

Track ball base structure

Inventor: Douglas Chang
Patented Case View Patent ↗
Granted: Sep 6, 1994 Filed: Jan 21, 1994
Inventor
Douglas Chang
Assignee (at issue)
BEHAVIOR TECH COMPUTER CORP.

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Quick Facts
Patent No.
US 5,345,253
App. No.
08/184,215
Filed
1994-01-21
Granted
1994-09-06
Kind
A