Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4659607 | Retouchable mat film | Yukio Shinagawa, Shinji Sakaguchi | 1987-04-21 |
| 4588673 | Retouchable mat film | Yukio Shinagawa, Shinji Sakaguchi | 1986-05-13 |
| 4582784 | Photographic light-sensitive element with backing layer | Masafumi Fukugawa, Yukio Shinagawa, Itsuo Fujiwara | 1986-04-15 |