Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880555 | Enzyme hydrolyzed maltodextrin containing finisher/preserver/cleaner composition for lithographic printing plates | John E. Walls | 1989-11-14 |
| 4873174 | Method of using developer-finisher compositions for lithographic plates | Shane Hsieh, Douglas A. Seeley | 1989-10-10 |
| 4822723 | Developer compositions for heavy-duty lithographic printing plates | — | 1989-04-18 |