Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4865940 | Photographic recording material | Gunther Schenk | 1989-09-12 |
| 4845024 | Hardeners for proteins, a binder layer hardened therewith and a photographic recording material containing such a layer | Wolfgang Himmelmann, Johannes Sobel, Hans Ohlschlager | 1989-07-04 |
| 4840890 | Hardened proteinic binder layer | Hans Ohlschlager, Johannes Sobel | 1989-06-20 |
| 4810628 | Color photographic recording material capable of being developed by heat treatment | Gunther Schenk | 1989-03-07 |
| 4808529 | Enzymes immobilized on polyamides or cellulose hydrate | Peter Doppelfeld, Gary M. Oosta, Alexander Riebel | 1989-02-28 |