Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4599295 | Photosensitive material with two photosensitive layers for forming separate imaged elements | Akira Yamano, Keiji Toei | 1986-07-08 |
| 4568627 | Film for chromatic proofreading | Tokujiro Ishida, Keiji Toei | 1986-02-04 |