Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7993446 | Dispersing agent for organic pigment and use thereof | Hiromitsu Yanagimoto, Naoto Kamata, Michiei Nakamura | 2011-08-09 |
| 7438999 | Dispersants for organic pigments | Shigeru Sakamoto, Masanori Takakamo, Seishichi Sasaki, Hiromitsu Yanagimoto, Yoshimasa Tsuchiya +2 more | 2008-10-21 |
| 7393404 | Pigment dispersants and their use | Hiromitsu Yanagimoto, Naoto Kamata, Kazuhito Ooki, Yutaka Miura, Shigeru Sakamoto +2 more | 2008-07-01 |
| 7347894 | Pigment dispersants and their use | Hiromitsu Yanagimoto, Naoto Kamata, Shigeru Sakamoto, Akio Yoshida, Michiei Nakamura | 2008-03-25 |
| 7135062 | Hydrophilic coloring matter for recording image, aqueous coloring agent for recording image, method and device for recording image | Michiei Nakamura, Hideyuki Koiso, Naoyuki Sakai, Yoshiyuki Zama, Atsushi Nogami +2 more | 2006-11-14 |
| 6605664 | Pigment dispersions, and writing instruments and printers with the dispersions stored therein | Kazuo Kanou, Yoshifumi Sugito | 2003-08-12 |
| 6471766 | Pigment dispersants and pigment compositions containing the same | Shigeru Ohki, Takayuki Soga, Kazutaka Aoki, Shotoku Takami, Hisao Okamoto +1 more | 2002-10-29 |
| 6302953 | Pigment dispersions for color filters, fabrication process of color filters, and color filters | Hisao Okamoto, Shigeru Sakamoto, Mitsuo Yamazaki, Tetsuo Fukuda, Shiro Yamamiya +2 more | 2001-10-16 |
| 6299676 | Pigment dispersants, pigment dispersions and writing or recording pigment inks | Hisao Okamoto, Shigeru Sakamoto, Mitsuo Yamazaki, Tetsuo Fukuda, Shiro Yamamiya +2 more | 2001-10-09 |
| 5961711 | Pigment dispersant, pigment dispersion, and pigment dispersion for color filter | Hisao Okamoto, Mitsuo Yamazaki, Shigeru Sakamoto, Shiro Yamamiya, Yoshio Abe +1 more | 1999-10-05 |
| 4912001 | Electrophotographic photoreceptor comprising azo compound and coupler | Hisao Kouno, Osamu Suda, Tetsuhiro Umezaki, Norio Tanaka, Toshifumi Sekino +3 more | 1990-03-27 |