Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4828570 | Tanning agent and a process for its preparation | Fritz Engelhardt, Kuno Reh, Helmut Croon, Hermann Becker, Werner Lotz | 1989-05-09 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4828570 | Tanning agent and a process for its preparation | Fritz Engelhardt, Kuno Reh, Helmut Croon, Hermann Becker, Werner Lotz | 1989-05-09 |