JM

John H. Markwell

📍 Seneca Rocks, WV: #1 of 1 inventorsTop 100%
🗺 West Virginia: #1,664 of 3,425 inventorsTop 50%
Overall (All Time): #4,007,465 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4632217 Automatically adjustable climbing harness Kyle Isenhart 1986-12-30