Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4304606 | Plasticized coal tar pitch, composition containing same and its use | Heinrich Louis, Helmut Kohler, Rudolf Oberkobusch, Gerd Collin | 1981-12-08 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4304606 | Plasticized coal tar pitch, composition containing same and its use | Heinrich Louis, Helmut Kohler, Rudolf Oberkobusch, Gerd Collin | 1981-12-08 |