JF

John S. Fetterolf

📍 Royersford, PA: #1 of 2 inventorsTop 50%
🗺 Pennsylvania: #852 of 3,759 inventorsTop 25%
Overall (1989): #95,580 of 140,708Top 70%
1
Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4867197 High pressure valve Andrew M. Ritter, James W. Williams 1989-09-19