Robert D. Bertin

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Placerville, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Mud motor
- Patent number 6,527,512
- Issue date Mar 4, 2003
- Brush Wellman, Inc.
- Robert D. Bertin
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...

Patents Applicationslast 30 patents

Information Patent Application
Mud motor
- Publication number 20020122722
- Publication date Sep 5, 2002
- Robert D. Bertin
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...