Ernest L. Buford

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Ponca City, OK, US

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Patents Grantslast 30 patents

Information Patent Grant
Drill bit and cutter having insert clusters and method of manufacture
- Patent number 7,040,424
- Issue date May 9, 2006
- Smith International, Inc.
- Zhou Yong
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Drill bit and cutter having insert clusters and method of manufacture
- Publication number 20040173384
- Publication date Sep 9, 2004
- Smith International, Inc.
- Zhou Yong
- E21 - EARTH DRILLING MINING