Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4838919 | Pretreatment of fused cast refractories | Gerald E. Kunkle | 1989-06-13 |
| 4808205 | Lid construction for a heating vessel and method of use | Gary N. Hughes | 1989-02-28 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4838919 | Pretreatment of fused cast refractories | Gerald E. Kunkle | 1989-06-13 |
| 4808205 | Lid construction for a heating vessel and method of use | Gary N. Hughes | 1989-02-28 |