Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879408 | Cycloaliphatic diisocyanates optionally in the form of isomer mixtures and a process for their production | Hartmut Knofel, Stefan Penninger, Herbert Stutz | 1989-11-07 |
| 4879409 | Cycloaliphatic diisocyanates, optionally in the form of isomeric mixtures and a process for their preparation | Hartmut Knofel, Stefan Penninger, Herbert Stutz | 1989-11-07 |