Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10474050 | Toner and charge control agent using pyrazolone derivative or salt of derivative | Jun Watanabe, Hideyuki Otsuka | 2019-11-12 |
| 9835965 | Charge control agent and toner using same | Masaki Okubo, Ikuo Kimura, Masami Ito, Motonori Tsuji, Takeshi Yamamoto +2 more | 2017-12-05 |
| 9703223 | Toner, developer, and toner cartridge | Masaki Okubo, Motonori Tsuji, Masami Ito, Masafumi Asakai, Tetsuya Yoshida | 2017-07-11 |
| 8790855 | Charge control agent and toner using same | Ikuo Kimura, Motonori Tsuji, Masami Ito, Kanae Hiraishi | 2014-07-29 |