Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4812546 | New copolymers of alpha-cyanoacrylates and acrylates, their preparation and their use | Helmut Waniczek, Christian Ohm, Josef Witte | 1989-03-14 |
| 4798873 | Polyolefinecarboxylic acids, their preparation and their use for preparing polyolefine-polycarbonate block copolymers | Helmut Waniczek, Gerd Sylvester, Josef Witte | 1989-01-17 |