Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4209323 | Process for the production of a product with high carbon content from waste soot | Heinz Echterhoff, Wilfried Gemmeke, Karl-Heinz Koch, Joachim Sieckmann | 1980-06-24 |