USD330558SExpiredUtility

Drilling machine

22
Assignee: CHANG CHIOU-FUPriority: Apr 10, 1990Filed: Apr 10, 1990Granted: Oct 27, 1992
Est. expiryApr 10, 2010(expired)· nominal 20-yr term from priority
Inventors:Chiou-Fu Chang
22
PatentIndex Score
4
Cited by
5
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for drilling machine, as shown and described.

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