John P. Simpson

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Naperville, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Control of casting machine
- Patent number 7,770,628
- Issue date Aug 10, 2010
- Griffin Pipe Products Company, Inc.
- John P. Simpson
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Grinding wheel and method for removal of sprues and riser pads from...
- Patent number 5,938,516
- Issue date Aug 17, 1999
- AMSTED Industries Incorporated
- John F. Simpson
- B60 - VEHICLES IN GENERAL

Patents Applicationslast 30 patents

Information Patent Application
Control of casting machine
- Publication number 20090090483
- Publication date Apr 9, 2009
- Griffin Pipe Products Co., Inc.
- John P. Simpson
- B22 - CASTING POWDER METALLURGY