Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5017457 | Presensitized printing plate for waterless lithographic printing and process for production thereof | Heinz Herrmann | 1991-05-21 |
| 4842990 | Presensitized negative working waterless planographic printing plate with amorphous silicic acid interlayer and process of making and using | Heinz Herrmann, Hans-Joachim Schlosser | 1989-06-27 |