Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5665515 | Method for obtaining a printing plate according to the silver salt diffusion transfer process | Lode Erik Dries Deprez, Jean-Marie Dewanckele | 1997-09-09 |
| 5645971 | Method for making a lithographic printing plate according to the silver salt diffusion transfer process | Ludo Van Rompuy, Rene De Keyzer, Jean-Marie Dewanckele, Jos Vaes | 1997-07-08 |
| 5599647 | New toning agents for thermographic and photothermographic materials and process | Geert Defieuw, Jean-Marie Dewanckele | 1997-02-04 |