USD403336SExpiredUtility

Five blade drill bit

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Assignee: DRESSER INDPriority: Dec 2, 1997Filed: Dec 2, 1997Granted: Dec 29, 1998
Est. expiryDec 2, 2017(expired)· nominal 20-yr term from priority
Inventors:Robert W. ArfeleGeorge A. EspirituEd Martin
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PatentIndex Score
3
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37
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1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a five blade drill bit, as shown and described.

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