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Gary J. Wallo
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Union Lake, MI, US
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last 30 patents
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Patent Grant
Automatic engine oil change indicator system
Patent number
4,847,768
Issue date
Jul 11, 1989
General Motors Corporation
Ellen S. Schwartz
B60 - VEHICLES IN GENERAL
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Patent Grant
Engine with spark ignition operation through the oil pressure switc...
Patent number
4,768,480
Issue date
Sep 6, 1988
General Motors Corporation
Daniel P. Grenn
F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS