Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12429793 | Magnetic carrier and two-component developer | Yuu Nishimura, Nobuyoshi Sugahara, Hironori Minagawa, Nobuhiro Yoshida | 2025-09-30 |
| 12386282 | Magnetic carrier, two-component developer, and developer for replenishment | Nobuhiro Yoshida, Hironori Minagawa, Nobuyoshi Sugahara, Yuu Nishimura | 2025-08-12 |
| 11624987 | Liquid developer | Takashi Hirasa, Yasutaka Akashi, Masato Nakajima, Naohiko Tsuchida, Akifumi Matsubara +4 more | 2023-04-11 |
| 11281120 | Liquid developer and image-forming method | Tomoyo Miyakai, Takashi Hirasa, Hayato Ida, Yasutaka Akashi | 2022-03-22 |
| 11188005 | Liquid developer | Tomoyo Miyakai, Takashi Hirasa, Hayato Ida, Yasutaka Akashi | 2021-11-30 |
| 11181848 | Liquid developer and method of producing liquid developer | Kouichirou Ochi, Tomoyo Miyakai, Akifumi Matsubara, Takashi Hirasa, Hayato Ida +1 more | 2021-11-23 |
| 10162281 | Liquid developer and manufacturing method of liquid developer | Naohiko Tsuchida, Yasutaka Akashi | 2018-12-25 |
| 9946175 | Electrophotographic photosensitive member, process cartridge, electrophotographic apparatus, and condensed polycyclic aromatic compound | Koichi Nakata, Shinji Takagi, Masaki Nonaka, Ryoichi Tokimitsu | 2018-04-17 |
| 8398774 | Method of manufacturing organic light emitting device and vapor deposition system | Manabu Otsuka, Seiji Mashimo, Toshiaki Yoshikawa, Naoto Fukuda | 2013-03-19 |
| 6566028 | Toner, and process for producing toner | Yayoi Tazawa, Takeshi Ikeda, Yoshinobu Baba, Hitoshi Itabashi, Yasukazu Ayaki | 2003-05-20 |
| 6358658 | Toner, and process for producing toner | Yayoi Tazawa, Takeshi Ikeda, Yoshinobu Baba, Hitoshi Itabashi, Yasukazu Ayaki | 2002-03-19 |
| 6165663 | Magnetic coated carrier two-component type developer and developing method | Yoshinobu Baba, Takeshi Ikeda, Yuko Sato, Hitoshi Itabashi | 2000-12-26 |
| 6159648 | Two-component type developer, developing method and image forming method | Yoshinobu Baba | 2000-12-12 |
| 6106990 | Process for producing toner particles | Yayoi Tazawa, Yoshinobu Baba, Hitoshi Itabashi, Yasukazu Ayaki | 2000-08-22 |
| 6083655 | Magnetic brush developing method | Hitoshi Itabashi, Yuko Sato, Yoshinobu Baba | 2000-07-04 |
| 6038419 | Contact charging device having a magnetic brush comprised of magnetic particles for electrostatically charging a photosensitive drum | — | 2000-03-14 |
| 6010811 | Two-component type developer, developing method and image forming method | Yoshinobu Baba | 2000-01-04 |
| 5766814 | Magnetic coated carrier, two-component type developer and developing method | Yoshinobu Baba, Takeshi Ikeda, Yuko Sato, Hitoshi Itabashi | 1998-06-16 |
| 5712069 | Two-component type developer, developing method and image forming method | Yoshinobu Baba | 1998-01-27 |
| 5573880 | Carrier for electrophotography, process for its production, two-component type developer, and image forming method | Shinya Mayama, Takeshi Ikeda, Yuko Sato, Yoshinobu Baba, Hiroshi Aoto +2 more | 1996-11-12 |