Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
FL

Fritz Lahman — 1 Patent

Hecla, SD: #1 of 1 inventorsTop 100%
South Dakota: #1,077 of 2,308 inventorsTop 50%
Overall (All Time): #4,097,143 of 4,157,543Top 100%
1 Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4290733 Forage stack mover 1981-09-22