Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4657878 | Method of making high density, fusion cast basic metallurgical refractory and the refractory itself | Thomas A. Clishem | 1987-04-14 |
| 4465454 | Extrusion die | Francis R. Duerr | 1984-08-14 |
| 4362686 | Collapsible core and method of using same | Thomas A. Clishem, Melvin L. Neville | 1982-12-07 |