USD331246SExpiredUtility

Drilling machine

50
Assignee: CHEN RUEY-ZONPriority: Jul 24, 1990Filed: Jul 24, 1990Granted: Nov 24, 1992
Est. expiryJul 24, 2010(expired)· nominal 20-yr term from priority
Inventors:Ruey-Zon Chen
50
PatentIndex Score
6
Cited by
5
References
1
Claims

Claims

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

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