USD332093SExpiredUtility
Computer track ball
Individually held — no corporate assignee on recordPriority: Feb 21, 1991Filed: Feb 21, 1991Granted: Dec 29, 1992
Est. expiryFeb 21, 2011(expired)· nominal 20-yr term from priority
Inventors:Tso S. Yang
57
PatentIndex Score
9
Cited by
7
References
1
Claims
Claims
exact text as granted — not AI-modifiedThe ornamental design for a computer track ball, as shown and described.
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