Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863831 | Photosensitive lithographic plate requiring no dampening water having a gelatin primer layer | Hiroshi Takahashi | 1989-09-05 |
| 4861698 | Photosensitive lithographic plate using no dampening water | Hiroshi Takahashi, Norihiko Kato | 1989-08-29 |