Karen Dufault

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E. Grand Forks, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Mobile apparatus with plurality of conveyors
- Patent number 6,283,697
- Issue date Sep 4, 2001
- Kevin J. Pierce
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Conveying, spreading and milling apparatus
- Patent number 6,220,531
- Issue date Apr 24, 2001
- Kevin J. Pierce
- A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
Information Patent Grant
Scraper and drag attachment
- Patent number 5,833,012
- Issue date Nov 10, 1998
- Kevin J. Pierce
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING