Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885230 | Burn-in gumming composition for offset printing plates | Paul Stahlhofen | 1989-12-05 |
| 4828959 | Light-sensitive diazonium resin mixture and light-sensitive diazonium resin containing recording material with organic peroxide compound | Georg Pawlowski, Guenter Jung | 1989-05-09 |
| 4824535 | Process for the electrochemical graining of aluminum for use in printing plate supports | Engelbert Pliefke | 1989-04-25 |