Donald D. Johnson

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Chisago, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Roll-pack diesel particulate filter
- Patent number 5,174,969
- Issue date Dec 29, 1992
- Minnesota Mining and Manufacturing Company
- Edward M. Fischer
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
High temperature resistant oil boom flotation core
- Patent number 4,923,332
- Issue date May 8, 1990
- Minnesota Mining and Manufacturing Company
- Stephen M. Sanocki
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING