Stephen D. Johnson

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Hanover, MI, US

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Patents Grantslast 30 patents

Information Patent Grant
Hydraulic pump
- Patent number 7,220,111
- Issue date May 22, 2007
- Production Research, LLC
- Stephen D. Johnson
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Lubricant pump and method of producing
- Patent number 6,592,348
- Issue date Jul 15, 2003
- Production Research, Inc.
- Stephen D. Johnson
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...

Patents Applicationslast 30 patents

Information Patent Application
Hydraulic pump
- Publication number 20060024187
- Publication date Feb 2, 2006
- Stephen D. Johnson
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...