Colin D. Campbell

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Troutville, VA, US

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Patents Grantslast 30 patents

Information Patent Grant
Steel retainer for rock drill
- Patent number 7,044,479
- Issue date May 16, 2006
- Paul B. Campbell, Jr.
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC

Patents Applicationslast 30 patents

Information Patent Application
Steel retainer for rock drill
- Publication number 20020195779
- Publication date Dec 26, 2002
- Paul B. Campbell
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC