David Johnson

UR U.S. Natural Resources: 1 patents #1 of 6Top 20%

📍 Muskegon, MI: #5 of 27 inventorsTop 20%

🗺 Michigan: #973 of 4,313 inventorsTop 25%

Overall (1994): #145,388 of 165,921Top 90%

Patents 1994

Issued Patents 1994

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
5368077	Zero lead planer	Charles L. Croghan	1994-11-29