Robert D. Bristol

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Beulah, MI, US

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Patents Grantslast 30 patents

Information Patent Grant
Crankless internal combustion engine
- Patent number 4,465,042
- Issue date Aug 14, 1984
- Robert D. Bristol
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Apparatus for split engine operation
- Patent number 4,401,068
- Issue date Aug 30, 1983
- Robert D. Bristol
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Crankless internal combustion engine
- Patent number 4,363,299
- Issue date Dec 14, 1982
- Robert D. Bristol
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Internal combustion engine with auxiliary combustion chamber
- Patent number 4,321,904
- Issue date Mar 30, 1982
- Robert D. Bristol
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Internal combustion engine with free floating auxiliary piston
- Patent number 4,211,082
- Issue date Jul 8, 1980
- Robert D. Bristol
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS