Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4802935 | Substrate for a lithographic printing plate | Heinz Bichsel, Jurgen Timm | 1989-02-07 |
| 4800950 | Process for manufacturing a substrate for a lithographic printing plate | Heinz Bichsel, Jurgen Timm | 1989-01-31 |