SS

Steven A. Spigarelli

📍 Bemidji, MN: #1 of 6 inventorsTop 20%
🗺 Minnesota: #695 of 2,841 inventorsTop 25%
Overall (1994): #65,194 of 165,921Top 40%
1
Patents 1994

Issued Patents 1994

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5314638 Ion exchange materials produced from hydrolyzed, debituminized, sulfonated peat Gerald H. Morine 1994-05-24