Issued Patents All Time
Showing 26–43 of 43 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5270281 | Heat-sensitive recording materials and phenol compounds | Atsuo Otsuji, Toshihiro Motoshima, Yoshimitsu Tanabe, Kiyoharu Hasegawa, Kazuyoshi Kikkawa +1 more | 1993-12-14 |
| 5245049 | Crystals of fluoran compound, crystalline solvates thereof and process for their preparation | Atsuo Otsuji, Kiyoharu Hasegawa, Kazuyoshi Kikkawa, Akihiro Yamaguchi | 1993-09-14 |
| 5231069 | Fluoran compound, heat sensitive recording materials comprising fluoran compound | Atsuo Otsuji, Kiyoharu Hasegawa, Masatoshi Takagi, Akihiro Yamaguchi | 1993-07-27 |
| 5220038 | Fluoran compounds, crystalline toluene adducts thereof, recording material comprising same and process for their preparation | Atsuo Otsuji, Kiyoharu Hasegawa, Masatoshi Takagi, Akihiro Yamaguchi | 1993-06-15 |
| 5210221 | Crystal of fluoran compound and preparation process of the crystal | Atsuo Otsuji, Kiyoharu Hasegawa, Kazuyoshi Kikkawa, Akihiro Yamaguchi | 1993-05-11 |
| 5208209 | Fluoran compounds, process for preparation thereof and recording materials comprising said compound | Atsuo Otsuji, Kiyoharu Hasegawa, Masatoshi Takagi, Akihiro Yamaguchi | 1993-05-04 |
| 5196507 | Process for producing granules of polycarbonate and composition thereof | Yoshiyuki Totani, Akihiro Yamaguchi | 1993-03-23 |
| 5194632 | Fluoran compound, useful in heat sensitive recording materials | Atsuo Otsuji, Kiyoharu Hasegawa, Masatoshi Takagi, Akihiro Yamaguchi | 1993-03-16 |
| 5185453 | Crystal of fluoran compound | Atsuo Otsuji, Kiyoharu Hasegawa, Kazuyoshi Kikkawa, Akihiro Yamaguchi | 1993-02-09 |
| 5169556 | Liquid crystal composition | Akihiro Mochizuki, Mitsuaki Hirose, Hideo Hama | 1992-12-08 |
| 5087706 | Fluoran compounds, process for preparation thereof and recording materials comprising said compound | Atsuo Otsuji, Kiyoharu Hasegawa, Masatoshi Takagi, Akihiro Yamaguchi | 1992-02-11 |
| 5072021 | Optically active naphthalene derivatives | Tsutomu Nishizawa | 1991-12-10 |
| 5059356 | Polarizing film | Katsuji Nakamura, Junichi Fujio, Shin Hosonuma, Tsutomu Nishizawa | 1991-10-22 |
| 5023343 | P-amino substituted tetraphenylthiophenes and electrophotographic photoreceptors containing them | Eishi Tanaka, Tsutomu Nishizawa, Yasuyuki Yamada, Hisato Itoh, Akihiro Yamaguchi | 1991-06-11 |
| 4970021 | Phthalocyanine compounds and utility thereof | Tsutomu Nishizawa, Takahisa Oguchi, Hisato Itoh, Katashi Enomoto | 1990-11-13 |
| 4963449 | P-amino substituted tetraphenylthiophenes and electrophotographic photoreceptors containing them | Eishi Tanaka, Tsutomu Nishizawa, Yasuyuki Yamada, Hisato Itoh, Akihiro Yamaguchi | 1990-10-16 |
| 4960538 | 1,2-naphthalocyanine near-infrared absorbent and recording/display materials using same | Hisato Itoh, Takahisa Oguchi, Katashi Enomoto, Tsutomu Nishizawa | 1990-10-02 |
| 4824882 | Polarizing film | Katsuji Nakamura, Junichi Fujio, Shin Hosonuma, Tsutomu Nishizawa | 1989-04-25 |