Gregory W. Draper

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Perry, OK, US

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Patents Grantslast 30 patents

Information Patent Grant
Roll independent variable inductance inclinometer
- Patent number 5,703,484
- Issue date Dec 30, 1997
- The Charles Machine Works, Inc.
- John W. Bieberdorf
- G01 - MEASURING TESTING
Information Patent Grant
Avoiding ghosting artifacts during surface location of subsurface t...
- Patent number 5,621,325
- Issue date Apr 15, 1997
- The Charles Machine Works, Inc.
- Gregory W. Draper
- E21 - EARTH DRILLING MINING