Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5017710 | Fluoran compound and coloring recording material using it | Tetsuo Igaki, Akio Kaneko, Kimiaki Kinoshita | 1991-05-21 |
| 4668967 | Fluoran compound and color forming record materials using the same | Masakichi Yahagi, Takeo Obitsu, Tetsuo Igaki, Kazuyuki Horisawa, Morio Nanbu +1 more | 1987-05-26 |