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John H. Schallenkamp

📍 Bridgewater, SD: #2 of 3 inventorsTop 70%
🗺 South Dakota: #1,077 of 2,308 inventorsTop 50%
Overall (All Time): #3,561,637 of 4,157,543Top 90%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
6470537 Footwear closure fastener replacement system — 2002-10-29