Donald M. Nelson

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Carlsbad, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Automatic crankcase oil change and makeup system
- Patent number 5,390,762
- Issue date Feb 21, 1995
- Power Plus Corporation
- Donald M. Nelson
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Automatic crankcase oil change and makeup system
- Patent number 4,869,346
- Issue date Sep 26, 1989
- Donald M. Nelson
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS