USD292600SExpiredUtility

Track ball unit

91
Assignee: ASEA ABPriority: Apr 9, 1984Filed: Oct 1, 1984Granted: Nov 3, 1987
Est. expiryApr 9, 2004(expired)· nominal 20-yr term from priority
Inventors:Eric Wagner
91
PatentIndex Score
33
Cited by
2
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a track ball unit, substantially as shown and described.

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