Richard P. Dunn

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Wichita Falls, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Directional boring head with blade assembly
- Patent number RE37975
- Issue date Feb 4, 2003
- The Charles Machine Works, Inc.
- Brent G. Stephenson
- 175 - Boring or penetrating the earth
Information Patent Grant
Apparatus for drilling a horizontal controlled borehole in the earth
- Patent number 5,148,880
- Issue date Sep 22, 1992
- The Charles Machine Works, Inc.
- Douglas W. Lee
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method of and apparatus for drilling a horizontal controlled boreho...
- Patent number 4,953,638
- Issue date Sep 4, 1990
- The Charles Machine Works, Inc.
- Richard P. Dunn
- E21 - EARTH DRILLING MINING