Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4289604 | Method of producing an isotropic coke | Georg Kolling, Ingo Romey, Harald Tillmanns | 1981-09-15 |
| 4219405 | Method of continuously producing coke | Harald Tillmanns, Ingo Romey | 1980-08-26 |