Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5235104 | Hydrazones and electrophotographic photoreceptors comprising them | Yasuyuki Yamada, Katashi Enomoto, Hisato Itoh, Tsutomu Nishizawa, Akihiro Yamaguchi | 1993-08-10 |
| 5132190 | Hydrozones and electrophotographic photoreceptors comprising them | Yasuyuki Yamada, Katashi Enomoto, Hisato Itoh, Tsutomu Nishizawa, Akihiro Yamaguchi | 1992-07-21 |
| 4997874 | Aqueous suspension and preparation method thereof | Makoto Asano, Kiyoharu Hasegawa, Masatoshi Takagi, Akihiro Yamaguchi, Keizaburo Yamaguchi +1 more | 1991-03-05 |
| 4931420 | Temperature history indicator and its manufacturing method | Makoto Asano, Haruki Tsutsumi, Eishi Tanaka, Yoshiro Fuseya, Kiyoharu Hasegawa | 1990-06-05 |
| 4735744 | Novel benzoquinone derivatives and production process thereof as well as use as color-developers suitable for recording materials | Michihiro Tsujimoto, Kiyoharu Hasegawa, Eishi Tanaka, Makoto Asano | 1988-04-05 |
| 4632987 | Process for the preparation of triarylmethane compounds | Michihiro Tsujimoto, Kiyoharu Hasegawa, Makoto Asano | 1986-12-30 |
| 4561000 | Heat-sensitive recording unit | Michihiro Tsujimoto, Makoto Asano, Kiyoharu Hasegawa | 1985-12-24 |
| 4480002 | Dyestuff-containing microscopic capsule suspension for record materials | Makoto Asano, Kiyoharu Hasegawa, Michihiro Tsujimoto | 1984-10-30 |
| 4398753 | Pressure sensitive recording unit | Makoto Asano, Kiyoharu Hasegawa, Michihiro Tsujimoto | 1983-08-16 |
| 4384871 | Dyestuff-containing microscopic capsule dispersion for record materials | Makoto Asano, Kiyoharu Hasegawa, Michihiro Tsujimoto | 1983-05-24 |