JH

John E. Hartmann

📍 Frankfort, IL: #117 of 200 inventorsTop 60%
🗺 Illinois: #48,934 of 84,256 inventorsTop 60%
Overall (All Time): #3,565,362 of 4,157,543Top 90%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
6488790 Method of making a high-strength low-alloy hot rolled steel R. Devesh K. Misra, A. John Boucek 2002-12-03