Larry D. Welch

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Tulsa County, OK, US

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Patents Grantslast 30 patents

Information Patent Grant
High pressure choke assembly
- Patent number 4,662,401
- Issue date May 5, 1987
- Dowell Schlumberger Incorporated
- Warren M. Zingg
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL