Karl B. Pierson

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Warren, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Fluid power operated sliding gate valve system for tank trucks, pip...
- Patent number 4,709,901
- Issue date Dec 1, 1987
- Betts Industries, Inc.
- Karl B. Pierson
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Receptacle apparatus for housing components of a lighting system
- Patent number 4,290,098
- Issue date Sep 15, 1981
- Betts Machine Company
- Karl B. Pierson
- F21 - LIGHTING
Information Patent Grant
High volume fluid pressure relief valve
- Patent number 3,974,850
- Issue date Aug 17, 1976
- Betts Machine Company
- Karl B. Pierson
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...