Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872906 | Process and plant for producing binder-free hot briquettes | Lothar Seidelmann, Heinz Maas | 1989-10-10 |
| 4853031 | Process for preparing binderfree hot briquettes for smelting purposes | Erich Hoffken, Werner Kaas, Lothar Seidelmann | 1989-08-01 |