James Douglas Sparling

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Denver, CO, US

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Patents Grantslast 30 patents

Information Patent Grant
Low speed valveless horizontally opposed piston rotary internal com...
- Patent number 7,938,097
- Issue date May 10, 2011
- James Douglas Sparling
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS

Patents Applicationslast 30 patents

Information Patent Application
Low speed valveless horizontally opposed piston rotary internal com...
- Publication number 20100024763
- Publication date Feb 4, 2010
- James Douglas Sparling
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS