Mark R. Stelter

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Pella, IA, US

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for attaching/detaching drill rod
- Patent number 6,845,825
- Issue date Jan 25, 2005
- Vermeer Manufacturing Company
- Brian J. Bischel
- E21 - EARTH DRILLING MINING
Information Patent Grant
Directional drilling machine and method of directional drilling
- Patent number 6,491,115
- Issue date Dec 10, 2002
- Vermeer Manufacturing Company
- Mark Van Houwelingen
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Method and apparatus for attaching/detaching drill rod
- Publication number 20020157870
- Publication date Oct 31, 2002
- Brian J. Bischel
- E21 - EARTH DRILLING MINING
Information Patent Application
Directional drilling machine and method of directional drilling
- Publication number 20010022238
- Publication date Sep 20, 2001
- Mark Van Houwelingen
- E21 - EARTH DRILLING MINING