USD334016SExpiredUtility

Drilling head

63
Assignee: DIAMANT BOART CRAELIUS ABPriority: Apr 23, 1990Filed: Oct 22, 1990Granted: Mar 16, 1993
Est. expiryApr 23, 2010(expired)· nominal 20-yr term from priority
Inventors:Gunnar JonssonLeo Holmsten
63
PatentIndex Score
15
Cited by
3
References
1
Claims

Claims

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

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