Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4854550 | Stopper for retaining slag and process for implementation and manufacture thereof | Jean-Charles Daussan, Gerard Daussan | 1989-08-08 |
| 4799652 | Lining for protecting the interior of a metallurgical vessel and a method for forming said lining | Jean-Charles Daussan, Gerard Daussan | 1989-01-24 |