Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859175 | Apparatus and process for optimizing combustion in chamber-type furnaces for baking carbonaceous blocks | Christian Dreyer, Jean-Claude Thomas | 1989-08-22 |
| 4826419 | Apparatus for relaxing stresses at the end of oedometric compacting of a mixture of an aggregate and a binder | Benoit Coste | 1989-05-02 |