JF

John S. Fetterolf

📍 Royersford, PA: #65 of 139 inventorsTop 50%
🗺 Pennsylvania: #30,495 of 74,527 inventorsTop 45%
Overall (All Time): #2,333,152 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4867197 High pressure valve Andrew M. Ritter, James W. Williams 1989-09-19
4343332 Line blind James W. Williams 1982-08-10