Cheryl R. DuVall

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Bartlesville, OK, US

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus, pumping system incorporating same, and methods of protec...
- Patent number 7,654,315
- Issue date Feb 2, 2010
- Schlumberger Technology Corporation
- Michael H. Du
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Apparatus, Pumping System Incorporating Same, and Methods of Protec...
- Publication number 20070074872
- Publication date Apr 5, 2007
- SCHLUMBERGER TECHNOLOGY CORPORATION
- Michael H. Du
- E21 - EARTH DRILLING MINING