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Gregory B. DeMaggio
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St. Clair Shores, MI, US
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last 30 patents
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Patent Grant
Apparatus for measuring soot concentration in engine oil
Patent number
4,281,533
Issue date
Aug 4, 1981
General Motors Corporation
Gary L. Eesley
F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS