Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871443 | Novel method for extraction of salts from coal tar and pitches | Herbert Beneke, Rudolf Oberkobusch, Siegfried Peter, Wolfgang Jaumann | 1989-10-03 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871443 | Novel method for extraction of salts from coal tar and pitches | Herbert Beneke, Rudolf Oberkobusch, Siegfried Peter, Wolfgang Jaumann | 1989-10-03 |