Ronald Edward Graf

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Winston-Salem, NC, US

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Patents Grantslast 30 patents

Information Patent Grant
Heat engine/ heat pump using centrifugal fans
- Patent number 8,087,247
- Issue date Jan 3, 2012
- Ronald Edward Graf
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Heat engine / heat pump using centrifugal fans
- Patent number 7,874,175
- Issue date Jan 25, 2011
- Ronald Edward Graf
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS

Patents Applicationslast 30 patents

Information Patent Application
Heat engine/ heat pump using centrifugal fans
- Publication number 20100115946
- Publication date May 13, 2010
- Ronald Edward Graf
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
Heat engine/ heat pump using centrifugal fans
- Publication number 20090282828
- Publication date Nov 19, 2009
- Ronald Edward Graf
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES