Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876118 | Negative correction of gravure printing plates | — | 1989-10-24 |
| 4871650 | Coating plate cylinders or sleeves with a continuous, seamless photosensitive layer | Jan H. Van Heuvelen | 1989-10-03 |