Douglas Peirce

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Pleasant Hill, IA, US

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Patents Grantslast 30 patents

Information Patent Grant
Devices and methods for power control in horizontal directional dri...
- Patent number 7,954,558
- Issue date Jun 7, 2011
- Vermeer Manufacturing Company
- Philip R. Lane
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Method and Apparatus for Managing Rod Changes in Horizontal Directi...
- Publication number 20090095526
- Publication date Apr 16, 2009
- Philip R. Lane
- E21 - EARTH DRILLING MINING
Information Patent Application
Devices and Methods for Power Control in Horizontal Directional Dri...
- Publication number 20090095527
- Publication date Apr 16, 2009
- Philip R. Lane
- E21 - EARTH DRILLING MINING