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

Louis A. Derwin

Newaygo, MI: #1 of 1 inventorsTop 100%
Michigan: #973 of 4,313 inventorsTop 25%
Overall (1994): #43,590 of 165,921Top 30%
1 Patents 1994

Issued Patents 1994

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5361502 Sanitary drum and can opening device 1994-11-08