JI

John S. Hasslen, III

📍 Elk River, MN: #77 of 238 inventorsTop 35%
🗺 Minnesota: #15,886 of 52,454 inventorsTop 35%
Overall (All Time): #1,246,812 of 4,157,543Top 30%
4
Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
7500835 Sump draining apparatus having easily replaceable sensor and mount therefor David M Gartner, Ronald C Case, Carl A. Swanson, Amber L Overgard 2009-03-10
6729848 Sensor mount for sump draining apparatus 2004-05-04
4992030 Sump draining apparatus 1991-02-12
4966534 Sump draining apparatus 1990-10-30