James L. De Rupa

CI Cmi International: 1 patents #20 of 44Top 50%

📍 Trenton, MI: #84 of 141 inventorsTop 60%

🗺 Michigan: #49,615 of 86,293 inventorsTop 60%

Overall (All Time): #3,891,818 of 4,157,543Top 95%

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Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
5072773	Mold and method for making variable hardness castings	Gary F. Ruff, Karl D. Voss, Peter M. Naysmith, Jr.	1991-12-17