Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6478846 | Method and device for injecting reducing agents in a shaft furnace | Louis Schmit, Raymond Mack, Karl Langner | 2002-11-12 |
| 5279741 | Process for regenerating used foundry sand | — | 1994-01-18 |