Martin A. Williams

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Tulsa, OK, US

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Patents Grantslast 30 patents

Information Patent Grant
Electronically calibrated beacon for a horizontal directional drill...
- Patent number 7,251,567
- Issue date Jul 31, 2007
- The Charles Machine Works, Inc.
- Frank S. Nickel
- G01 - MEASURING TESTING

Patents Applicationslast 30 patents

Information Patent Application
Electronically calibrated beacon for a horizontal directional drill...
- Publication number 20060161351
- Publication date Jul 20, 2006
- The Charles Machine Works, Inc.
- Frank S. Nickel
- E21 - EARTH DRILLING MINING