Gerald R. Leeb

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Strom, Alberta, CA

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Patents Grantslast 30 patents

Information Patent Grant
Reverse circulating control valve
- Patent number 6,296,059
- Issue date Oct 2, 2001
- Rodney Leeb
- E21 - EARTH DRILLING MINING
Information Patent Grant
Hydraulic submersible pump for oil well production
- Patent number 6,004,114
- Issue date Dec 21, 1999
- Edmund C. Cunningham
- E21 - EARTH DRILLING MINING