Karl H. Hellmann

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Ann Arbor, MI, US

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Patents Grantslast 30 patents

Information Patent Grant
Spark-ignited reciprocating piston engine having a subdivided combu...
- Patent number 5,617,823
- Issue date Apr 8, 1997
- Charles Gray
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS