Dennis C. Hatfield

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Amarillo, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Attachable/detachable pressure evacuation device
- Patent number 11,835,181
- Issue date Dec 5, 2023
- Westem Valve Inc.
- Dennis C. Hatfield
- F17 - STORING OF DISTRIBUTING GASES OR LIQUIDS
Information Patent Grant
Poppet valve assembly
- Patent number 7,270,140
- Issue date Sep 18, 2007
- Steven K. Aderholt
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Poppet shear protection apparatus and system
- Patent number 7,066,193
- Issue date Jun 27, 2006
- Steven K. Aderholt
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Method and apparatus for orbital and seal welded relief device on a...
- Patent number 6,742,538
- Issue date Jun 1, 2004
- Western Valve
- Steven K. Aderholt
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

Information Patent Application
ATTACHABLE/DETACHABLE PRESSURE EVACUATION DEVICE
- Publication number 20220057047
- Publication date Feb 24, 2022
- Western Valve Inc.
- DENNIS C. HATFIELD
- F17 - STORING OF DISTRIBUTING GASES OR LIQUIDS
Information Patent Application
Poppet valve assembly
- Publication number 20040261843
- Publication date Dec 30, 2004
- Steven K. Aderholt
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Application
Poppet shear protection apparatus and system
- Publication number 20040226604
- Publication date Nov 18, 2004
- Steven K. Aderholt
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...