Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866148 | Hydrophilic copolymers, the use thereof as biomedical materials and contact-optical articles produced therefrom | Otto-Christian Geyer | 1989-09-12 |
| 4795780 | Process for the preparation of binary .alpha.-methylstyrene/acrylonitrile resins by multi-stage bulk polymerization | Klaus Summermann, Gerd Wassmuth, Alfred Pischtschan, Joachim Doring | 1989-01-03 |