Raymond Wieveg

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Los Angeles, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Ball type valve having improved redundant sealing system
- Patent number 4,342,330
- Issue date Aug 3, 1982
- Hydril Company
- Raymond Wieveg
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Inside blowout preventer well tool
- Patent number 4,294,314
- Issue date Oct 13, 1981
- Hydril Company
- Tosh Miyagishima
- E21 - EARTH DRILLING MINING