Donald W. Bell

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Austin, MN, US

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Patents Applicationslast 30 patents

Information Patent Application
MATERIAL MOVING APPARATUS
- Publication number 20120282127
- Publication date Nov 8, 2012
- David A. Olson
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Application
HIGH SOLIDS MATERIAL MOVING APPARATUS
- Publication number 20100278666
- Publication date Nov 4, 2010
- David A. Olson
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...