JO

John R. Olthoff

📍 Grand Rapids, MI: #1,022 of 1,824 inventorsTop 60%
🗺 Michigan: #49,615 of 86,293 inventorsTop 60%
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1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5203127 Earth anchor Wayne Nichols, Rick A. Harmon, Charles L. Duncan 1993-04-20