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Jeffrey E. Spethmann

DC Donaldson Company: 1 patents #454 of 695Top 70%
EA E.I. Du Pont De Nemours And: 1 patents #4,343 of 8,010Top 55%
📍 Doylestown, PA: #596 of 956 inventorsTop 65%
🗺 Pennsylvania: #43,221 of 74,527 inventorsTop 60%
Overall (All Time): #3,625,561 of 4,157,543Top 90%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
6110333 Composite membrane with highly crystalline porous support James T. Keating 2000-08-29