Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5286702 | Phthalide compound and recording material using the compound | Yutaka Muraki, Hidekazu ISHIDA, Hajime Kawai | 1994-02-15 |
| 5179066 | Thermosensitive recording material | Manabu Yamada, Toshiro Narizuka, Hajime Kawai, Takayuki Kurosaki | 1993-01-12 |
| 4892973 | Process for producing 1,1-diphenylalkenes | Kozo Mizuno, Hideaki Fujisaki, Yoshinori Uda, Tadashi Imai | 1990-01-09 |
| 4845245 | Process for producing 3,3-bis-(4-dimethylaminophenyl)-6-dimethylaminophthalide | Yoshiharu Fujino, Hajime Kawai | 1989-07-04 |
| 4835291 | Divinyl compounds and chromogenic recording-material prepared by using thereof | Hajime Kawai, Yoshiharu Fujino, Youji Shimizu, Seiichi Nieda, Kazuhiko Gendai | 1989-05-30 |
| 4820841 | Chromogenic quinoline compounds | Hideaki Fujisaki, Kouzou Mizuno, Yukihiko Sueto | 1989-04-11 |
| 4814320 | Heat-sensitive recording material | Hajime Kawai, Masatoshi Taniguchi | 1989-03-21 |
| 4808567 | Divinyl compounds and chromogenic recording-material prepared by using thereof | Hajime Kawai, Yoshiharu Fujino, Youji Shimizu, Seiichi Nieda, Kazuhiko Gendai | 1989-02-28 |
| 4747875 | Chromogenic azaphthalide compound and a colour-forming recording composition containing the same | Hajime Kawai, Toshiyuki Nakai | 1988-05-31 |
| 4598150 | Chromogenic 1-(3-methoxy-4-alkoxyphenyl)-2-(2'-quinolyl)ethylene compounds | Hideaki Fujisaki, Seiichi Nieda | 1986-07-01 |
| 4564679 | Chromogenic compounds | Yoshiharu Fujino, Hajime Kawai, Yasushi Nakai | 1986-01-14 |
| 4444591 | Chromogenic compounds and the use thereof as color former in copying or recording materials | Hajime Kawai, Yoshiharu Fujino, Yoji Shimizu | 1984-04-24 |