RF

R. D. Forsgren

DC Donaldson Company: 2 patents #358 of 695Top 55%
📍 Bloomington, MN: #520 of 1,157 inventorsTop 45%
🗺 Minnesota: #23,881 of 52,454 inventorsTop 50%
Overall (All Time): #2,302,813 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5222488 Respirator air filter cartridge with a replaceable filter element 1993-06-29
5063926 Respirator cartridge with sealant dispersion member Henry J. Drasner, III, Roy E. Fielder 1991-11-12