Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4333816 | Method for the production of needle coke | Georg Kolling, Ingo Romey | 1982-06-08 |
| 4231856 | Purifying filter-clogging coal tar formed from low-temperature coal carbonization | Ingo Romey | 1980-11-04 |