Harry Weston

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Warnam, GB

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Patents Grantslast 30 patents

Information Patent Grant
Rotatable ball valve apparatus and method
- Patent number 4,703,807
- Issue date Nov 3, 1987
- Hydril Company
- Harry Weston
- E21 - EARTH DRILLING MINING
Information Patent Grant
Rotatable ball valve apparatus and method
- Patent number 4,681,133
- Issue date Jul 21, 1987
- Hydril Company
- Harry Weston
- E21 - EARTH DRILLING MINING
Information Patent Grant
Gate valve apparatus and method
- Patent number 4,572,298
- Issue date Feb 25, 1986
- Hydril Company
- Harry Weston
- E21 - EARTH DRILLING MINING