Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4838934 | Process for a direct reduction of iron oxide containing materials in a rotary kiln | Wolfram Schnabel | 1989-06-13 |
| 4369059 | Process of directly reducing iron oxide containing materials in a rotary kiln | Wolfram Schnabel | 1983-01-18 |