Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12280990 | Winch drive device in crane | Hitoshi Sakurai, Yoshiki Kamon, Taisuke Tsunoo | 2025-04-22 |
| 9893038 | Light-emitting device having first and second wiring patterns | — | 2018-02-13 |
| 9835965 | Charge control agent and toner using same | Ikuo Kimura, Masami Ito, Motonori Tsuji, Takeshi Yamamoto, Masaya Tojo +2 more | 2017-12-05 |
| 9703223 | Toner, developer, and toner cartridge | Motonori Tsuji, Masami Ito, Masaya Tojo, Masafumi Asakai, Tetsuya Yoshida | 2017-07-11 |
| 9141014 | Toner for developing electrostatic charge image | Tatsuji Orita, Hideyuki Otsuka, Kenichi Sato, Kanae Hiraishi | 2015-09-22 |
| 8962866 | Surface-modified silica powder and method for producing the same, as well as toner composition for electrophotography | Yuki Amano, Naohiro Naito, Hisao Okada, Yoshikazu Aoki, Hideyuki Otsuka | 2015-02-24 |
| 8580470 | Charge control agent composition and toner utilizing the same | Hideyuki Otsuka, Osamu Mukudai | 2013-11-12 |
| 7901858 | Mixed cyclic phenol sulfides, and charge control agents and toners using the same | Masateru Yasumura, Masami Ito, Naohiro Tarumoto, Yoshikazu Aoki, Masafumi Umekawa +2 more | 2011-03-08 |
| 7820832 | Oxidized mixed cyclic phenol sulfides, and charge control agents and toners using the same | Masateru Yasumura, Masami Ito, Naohiro Tarumoto, Yoshikazu Aoki, Masafumi Umekawa +2 more | 2010-10-26 |
| 7709172 | Oxidized mixed cyclic phenol sulfides, and charge control agents and toners using the same | Masateru Yasumura, Masami Ito, Naohiro Tarumoto, Yoshikazu Aoki, Masafumi Umekawa +2 more | 2010-05-04 |
| 7402369 | Mono azo iron complex compound, and charge controlling agent and toner using the same | Hideyuki Otsuka, Kazuo Nemoto, Masami Ito, Eisuke Yamada | 2008-07-22 |
| 7094512 | Electrophotographic printing method, monoazo iron complex compound, charge controlling agent using the same and toner using the charge controlling agent | Hideyuki Otsuka, Kazuo Nemoto, Shinji Otani, Noriyuki Suzuki, Eisuke Yamada | 2006-08-22 |
| 6627368 | Organic metal complex compound and electrostatic image developing toner using the same | Hiroshi Nanaumi, Masataka Sawano | 2003-09-30 |
| 5312707 | Electrophotographic photoconductor and diamine compounds for use in the same | Masafumi Ota, Masaomi Sasaki, Tamotsu Aruga, Tomoyuki Shimada, Mitsutoshi Anzai | 1994-05-17 |