Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4769308 | Dry presensitized plate with photosensitive layer containing organotin | Toshihiko Hiruma, Hiroshi Takahashi | 1988-09-06 |
| 4690886 | Method for making negative working O-quinone diazide containing dry planographic printing plate utilizing multiply light exposure, development and basic treatment | Hiroshi Takahashi, Keisuke Shiba | 1987-09-01 |
| 4186006 | Method for developing a lithographic printing plate | Kesanao Kobayashi, Hiroshi Matumoto | 1980-01-29 |