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Otto Knottnerus

HA Harvard: 2 patents #1 of 8Top 15%
Overall (All Time): #2,083,050 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

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