Issued Patents All Time
Showing 1–25 of 43 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8294144 | Organic transistor | Takahiro Fujiyama, Yoshiyuki Totani | 2012-10-23 |
| 7166240 | Hydrocarbon compounds, materials for organic electroluminescent elements and organic electroluminescent elements | Tsutomu Ishida, Takehiko Shimamura, Yoshiyuki Totani | 2007-01-23 |
| 6929870 | Hydrocarbon compounds, materials for organic electroluminescent elements and organic electroluminescent elements | Tsutomu Ishida, Takehiko Shimamura, Yoshiyuki Totani | 2005-08-16 |
| 6383982 | Color developer composition, aqueous dispersion, recording sheet and color developing ink | Jotaro Kida, Yoshimitsu Tanabe, Nobuhiro Takizawa | 2002-05-07 |
| 6217793 | Acetylene compound, liquid crystal composition and liquid crystal element | Yoshiyuki Totani, Hiroe Kayashima, Tsutomu Ishida | 2001-04-17 |
| 5861108 | Naphthalene compound, and liquid crystal composition and liquid crystal element using the same | Tsutomu Ishida, Atsuo Otsuji, Yoshiyuki Totani, Motokazu Hirao, Hiroe Kayashima | 1999-01-19 |
| 5770108 | Pyrimidine compound and liquid crystal composition and liquid crystal element using the same | Yoshiyuki Totani, Motokazu Hirao, Atsuo Otsuji, Tsutomu Ishida, Hiroe Kayashima | 1998-06-23 |
| 5647896 | Color-developing agents and color-developing sheets | Takeshi Nishimura, Tomoko Kamashita, Masaru Wada, Teruyuki Nagata, Yoshimitsu Tanabe +1 more | 1997-07-15 |
| 5525686 | Polyvalent metal salt of salicyclic acid resin and process for preparing it | Yoshimitsu Tanabe, Jotaro Kida, Kiyoharu Hasegawa, Masayuki Furuya, Takeshi Nishimura | 1996-06-11 |
| 5476957 | Salicylic acid derivatives | Yoshimitsu Tanabe, Yuki Kobayashi, Atsuo Otsuji, Akihiro Yamaguchi | 1995-12-19 |
| 5426170 | Method for preparing an aromatic polycarbonate | Motokazu Hirao, Yoshiyuki Totani, Tomonori Ito, Akihiro Yamaguchi | 1995-06-20 |
| 5391806 | Heat-sensitive recording materials and phenol compounds | Atsuo Otsuji, Toshihiro Motoshima, Yoshimitsu Tanabe, Kiyoharu Hasegawa, Kazuyoshi Kikkawa +1 more | 1995-02-21 |
| 5380814 | Aromatic polycarbonate and process for production thereof | Yoshiyuki Totani, Motokazu Hirao, Tomonori Ito, Akihiro Yamaguchi | 1995-01-10 |
| 5359117 | Processes for producing aromatic polycarbonate oligomer and aromatic polycarbonate | Yoshiyuki Totani, Motokazu Hirao, Tomonori Ito, Akihiro Yamaguchi, Ken-ichi Goto +4 more | 1994-10-25 |
| 5354513 | Polarizing film | Katsuji Nakamura, Junichi Fujio, Shin Hosonuma, Tsutomu Nishizawa | 1994-10-11 |
| 5348685 | Ferroelectric liquid crystal composition | Akihiro Mochizuki, Shigeo Kasahara, Tetsuya Makino, Masashi Watanabe, Kunikiyo Yoshio +4 more | 1994-09-20 |
| 5346878 | Recording material | Naomasa Koike, Akinori Okada | 1994-09-13 |
| 5324704 | Fluoran compounds, crystalline toluene adducts thereof, recording material comprising same and process for their preparation | Atsuo Otsuji, Kiyoharu Hasegawa, Masatoshi Takagi, Akihiro Yamaguchi | 1994-06-28 |
| 5306688 | Salicylic acid derivatives, the process for preparing the same and the heat-sensitive recording materials comprising thereof | Yoshimitsu Tanabe, Yuki Kobayashi, Atsuo Otsuji, Kiyoharu Hasegawa, Kazuyoshi Kikkawa +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, Kiyoharu Hasegawa, Kazuyoshi Kikkawa, Akihiro Yamaguchi | 1994-04-12 |
| 5300473 | Recording material comprising crystal of fluoran compound | Atsuo Otsuji, Kiyoharu Hasegawa, Kazuyoshi Kikkawa, Akihiro Yamaguchi | 1994-04-05 |
| 5300661 | Process for preparation of a recording material comprising a novel crystal of a fluoran compound | Atsuo Otsuji, Kiyoharu Hasegawa, Kazuyoshi Kikkawa, Akihiro Yamaguchi | 1994-04-05 |
| 5286418 | Polarizing film | Katsuji Nakamura, Junichi Fujio, Shin Hosonuma, Tsutomu Nishizawa | 1994-02-15 |
| 5283222 | Recording material comprising novel crystalline fluoran and process for prepartion of the said crystalline fluoran | Atsuo Otsuji, Kiyoharu Hasegawa, Kazuyoshi Kikkawa, Akihiro Yamaguchi | 1994-02-01 |
| 5281570 | Thermochromic materials | Kiyoharu Hasegawa, Yoshimitsu Tanabe, Kazuyoshi Kikkawa, Akihiro Yamaguchi | 1994-01-25 |