Paul Campbell

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Troutville, VA, US

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Patents Grantslast 30 patents

Information Patent Grant
Foot valve assembly for a down hole drill
- Patent number 8,561,730
- Issue date Oct 22, 2013
- Atlas Copco Secoroc LLC
- Jing James Yao
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Variable frequency control for down hole drill and method
- Patent number 8,215,419
- Issue date Jul 10, 2012
- Atlas Copco Secoroc LLC
- Timothy J. Plunkett
- E21 - EARTH DRILLING MINING
Information Patent Grant
Drilling systems
- Patent number 7,040,417
- Issue date May 9, 2006
- CCT Technologies, L.L.C.
- Paul B. Campbell
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
FOOT VALVE ASSEMBLY FOR A DOWN HOLE DRILL
- Publication number 20110232922
- Publication date Sep 29, 2011
- Jing James Yao
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Application
VARIABLE FREQUENCY CONTROL FOR DOWN HOLE DRILL
- Publication number 20100282509
- Publication date Nov 11, 2010
- Timothy J. Plunkett
- E21 - EARTH DRILLING MINING
Information Patent Application
Operating system for hydraulic rock drill
- Publication number 20030006053
- Publication date Jan 9, 2003
- Paul B. Campbell
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
Information Patent Application
Valve for hydraulic rock drill
- Publication number 20030006052
- Publication date Jan 9, 2003
- Paul B. Campbell
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
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