Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4727162 | Molecular compound of fluoran compound and ketone | Tetsuo Igaki | 1988-02-23 |
| 4695640 | Addition compound of fluoran compounds and ketone | Tetsuo Igaki, Shinji Yoshinaka, Kimiaki Kinoshita, Morikuni Saito, Toshiyuki Yamashita +1 more | 1987-09-22 |
| 4677203 | Chromogenic fluoran derivatives | Shoichi Horiuchi, Takahumi Toyama, Akio Kashiwagi, Teruo Suzuki, Tetsuo Igaki +2 more | 1987-06-30 |
| 4668967 | Fluoran compound and color forming record materials using the same | Takeo Obitsu, Tetsuo Igaki, Kazuyuki Horisawa, Morio Nanbu, Kimiaki Kinoshita +1 more | 1987-05-26 |
| 4665199 | 3-N-isobutylethylamino-6-methyl-7-phenylaminofluoran | Tetsuo Igaki, Sinzi Yoshinaka, Kousaku Morita, Morikuni Saito, Kimiaki Kinoshita | 1987-05-12 |
| 4642357 | Chromogenic recording materials | Tetsuo Igaki, Sinzi Yosinaka, Kousaku Morita, Morikuni Saito, Kimiaki Kinoshita | 1987-02-10 |
| 4616239 | 4-hydroxy-4'-isopropoxydiphenylsulfone and its use for color-developable recording material | Tetsuo Igaki, Shinji Yoshinaka, Kosaku Morita, Kimiaki Kinoshita, Masashi Enokiya +2 more | 1986-10-07 |
| 4613879 | Chromogenic recording materials | Tetsuo Igaki, Sinzi Yoshinaka, Kousaku Morita, Morikuni Saito, Kimiaki Kinoshita | 1986-09-23 |
| 4590498 | Chromogenic recording materials | Tetsuo Igaki, Sinzi Yosinaka, Kousaku Morita, Morikuni Saito, Kimiaki Kinoshita | 1986-05-20 |
| 4568766 | 4-Hydroxy-4'-isopropoxydiphenylsulfone and its use for color-developable recording material | Tetsuo Igaki, Shinji Yoshinaka, Kosaku Morita, Kimiaki Kinoshita, Masashi Enokiya +2 more | 1986-02-04 |
| 4503446 | Heat-sensitive color-developing composition | Kimiaki Kinoshita, Masashi Enokiya | 1985-03-05 |
| 4410708 | Chromogenic fluoran derivatives and the preparation and use thereof | Shoichi Horiuchi, Takahumi Toyama, Akio Kashiwagi, Teruo Suzuki, Tetsuo Igaki +2 more | 1983-10-18 |