Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4826806 | Fluoran compounds and color forming recording materials using same | Takeo Obitsu, Shinji Yoshinaka, Minoru Koguchi, Mitsuhiro Yanagita, Nobuyuki Hirai | 1989-05-02 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4826806 | Fluoran compounds and color forming recording materials using same | Takeo Obitsu, Shinji Yoshinaka, Minoru Koguchi, Mitsuhiro Yanagita, Nobuyuki Hirai | 1989-05-02 |