LE

Leonard L. Ervin

HO Howmet: 2 patents #31 of 110Top 30%
HR Howmet Research: 1 patents #57 of 117Top 50%
📍 Whitehall, MI: #20 of 74 inventorsTop 30%
🗺 Michigan: #27,158 of 86,293 inventorsTop 35%
Overall (All Time): #1,606,612 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
6805189 Die casting 2004-10-19
5443111 Permanent mold for casting reactive melt Gregory N. Colvin, Robert F. Johnson 1995-08-22
5287910 Permanent mold casting of reactive melt Gregory N. Colvin, Robert F. Johnson 1994-02-22