Roger J. Koerner

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Fountain Valley, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Rotary motion failsafe gate valve actuator
- Patent number 3,989,223
- Issue date Nov 2, 1976
- Exxon Production Research Company
- Joseph A. Burkhardt
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...