Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4838955 | Method for the manufacture of hard steel sheet from Al-killed continuous-cast carbon-manganese steel | Jan B. Kleijn, Maarten A. de Haas, Thomas M. Hoogendoorn | 1989-06-13 |