DG

D. Roger Glass

📍 Ann Arbor, MI: #3,831 of 6,071 inventorsTop 65%
🗺 Michigan: #49,615 of 86,293 inventorsTop 60%
Overall (All Time): #4,061,438 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4417721 Lance tip for oxygen steelmaking Robert D. Pehlke, Lyle J. Johnson, deceased, by Evelyn Johnson, administratrix 1983-11-29