Randolph J. Christman

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South Bend, IN, US

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Patents Grantslast 30 patents

Information Patent Grant
Air admittance vent
- Patent number 8,360,105
- Issue date Jan 29, 2013
- JB Products, Inc.
- Steven W. Cashen
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

Information Patent Application
Air admittance vent
- Publication number 20120261006
- Publication date Oct 18, 2012
- JB Products, Inc.
- Steven W. Cashen
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...