Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4867588 | Method for manufacture of a mutli-color ink ribbon including ink migration barrier | Shigeru Okushima | 1989-09-19 |
| 4868090 | Methods for the manufacture of cylindrical photosensitive resin structures and cylindrical printing plates | Mayumi Yoshimoto | 1989-09-19 |