La Von P. Grotto

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Litchfield, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Grain cleaning auger
- Patent number 4,684,458
- Issue date Aug 4, 1987
- La Von P. Grotto
- B07 - SEPARATING SOLIDS FROM SOLIDS SORTING
Information Patent Grant
Method and apparatus for cleaning cylindrical air filters
- Patent number 3,998,656
- Issue date Dec 21, 1976
- La Von P. Grotto
- B08 - CLEANING