Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5691272 | Carboxylate and heat-sensitive recording material using same | Mansuke Matsumoto, Nobuaki Sasaki, Bunji Sawano, Kiyoharu Hasegawa | 1997-11-25 |
| 5559247 | Carboxylate and heat-sensitive recording material using same | Mansuke Matsumoto, Nobuaki Sasaki, Bunji Sawano, Kiyoharu Hasegawa | 1996-09-24 |
| 5391806 | Heat-sensitive recording materials and phenol compounds | Atsuo Otsuji, Toshihiro Motoshima, Yoshimitsu Tanabe, Kiyoharu Hasegawa, Masakatsu Nakatsuka +1 more | 1995-02-21 |
| 5306688 | Salicylic acid derivatives, the process for preparing the same and the heat-sensitive recording materials comprising thereof | Yoshimitsu Tanabe, Yuki Kobayashi, Atsuo Otsuji, Masakatsu Nakatsuka, Kiyoharu Hasegawa +3 more | 1994-04-26 |
| 5302571 | Crystals of fluoran compound, crystalline solvates thereof, process for their preparation and recording material comprising said crystal or said solvate | Atsuo Otsuji, Masakatsu Nakatsuka, Kiyoharu Hasegawa, Akihiro Yamaguchi | 1994-04-12 |
| 5300661 | Process for preparation of a recording material comprising a novel crystal of a fluoran compound | Masakatsu Nakatsuka, Atsuo Otsuji, Kiyoharu Hasegawa, Akihiro Yamaguchi | 1994-04-05 |
| 5300473 | Recording material comprising crystal of fluoran compound | Masakatsu Nakatsuka, Atsuo Otsuji, Kiyoharu Hasegawa, Akihiro Yamaguchi | 1994-04-05 |
| 5283222 | Recording material comprising novel crystalline fluoran and process for prepartion of the said crystalline fluoran | Masakatsu Nakatsuka, Atsuo Otsuji, Kiyoharu Hasegawa, Akihiro Yamaguchi | 1994-02-01 |
| 5281570 | Thermochromic materials | Kiyoharu Hasegawa, Yoshimitsu Tanabe, Masakatsu Nakatsuka, Akihiro Yamaguchi | 1994-01-25 |
| 5270281 | Heat-sensitive recording materials and phenol compounds | Atsuo Otsuji, Toshihiro Motoshima, Yoshimitsu Tanabe, Kiyoharu Hasegawa, Masakatsu Nakatsuka +1 more | 1993-12-14 |
| 5245049 | Crystals of fluoran compound, crystalline solvates thereof and process for their preparation | Atsuo Otsuji, Masakatsu Nakatsuka, Kiyoharu Hasegawa, Akihiro Yamaguchi | 1993-09-14 |
| 5210221 | Crystal of fluoran compound and preparation process of the crystal | Masakatsu Nakatsuka, Atsuo Otsuji, Kiyoharu Hasegawa, Akihiro Yamaguchi | 1993-05-11 |
| 5185453 | Crystal of fluoran compound | Masakatsu Nakatsuka, Atsuo Otsuji, Kiyoharu Hasegawa, Akihiro Yamaguchi | 1993-02-09 |