David R. Marr JR.

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Fort Collins, CO, US

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Patents Applicationslast 30 patents

Information Patent Application
Method for supporting a subsurface material
- Publication number 20070231086
- Publication date Oct 4, 2007
- Herbert S. Price
- E21 - EARTH DRILLING MINING
Information Patent Application
Roof bolt plate
- Publication number 20070231084
- Publication date Oct 4, 2007
- Herbert S. Price
- E21 - EARTH DRILLING MINING