Ronald J. Johnston

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Welington, OH, US

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Patents Grantslast 30 patents

Information Patent Grant
Switchover valve
- Patent number 8,272,393
- Issue date Sep 25, 2012
- Superior Products, Inc.
- Ronald J. Johnston
- G05 - CONTROLLING REGULATING

Patents Applicationslast 30 patents

Information Patent Application
SWITCHOVER VALVE
- Publication number 20090107560
- Publication date Apr 30, 2009
- Superior Products, Inc.
- Ronald J. Johnston
- G05 - CONTROLLING REGULATING