William Harley Frankenfield

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Sparks, MD, US

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Patents Grantslast 30 patents

Information Patent Grant
Backflow preventing apparatus for water closets
- Patent number 8,636,026
- Issue date Jan 28, 2014
- Thomas Earl Kelly
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Backflow preventing apparatus for water closets
- Patent number 7,789,104
- Issue date Sep 7, 2010
- Thomas Earl Kelly
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

Information Patent Application
Backflow preventing apparatus for water closets
- Publication number 20110017316
- Publication date Jan 27, 2011
- Thomas Earl Kelly
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Application
Backflow preventing apparatus for water closets
- Publication number 20090071552
- Publication date Mar 19, 2009
- Thomas Earl Kelly
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...