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Otto Knottnerus

HA Harvard: 2 patents #1 of 8Top 15%
📍 Evansville, WI: #13 of 28 inventorsTop 50%
🗺 Wisconsin: #17,084 of 40,088 inventorsTop 45%
Overall (All Time): #2,083,050 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
8617404 Fluid filter apparatus and methods Larry Langmeier, Mark Berger 2013-12-31
7938971 Fluid filter apparatus and methods Larry Langmeier, Mark Berger 2011-05-10