Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8628905 | Ferrite core material for resin-filled type carrier, resin-filled type carrier, and electrophotographic developer using the carrier | Hiromichi Kobayashi, Tsuyoshi Itagoshi, Tomoyuki Suwa | 2014-01-14 |
| 8092971 | Resin-coated carrier for electrophotographic developer and process for producing the same, and electrophotographic developer comprising the resin-coated carrier | Kanao Kayamoto, Hironori HOJO | 2012-01-10 |
| 7824833 | Resin-coated ferrite carrier for electrophotographic developer, its production method, and electrophotographic developer using the resin-coated ferrite carrier | Kanao Kayamoto, Issei Shinmura | 2010-11-02 |
| 7598011 | Irregular shaped ferrite carrier and electrophotographic developer using the ferrite carrier | Hiromichi Kobayashi, Toru Iwata | 2009-10-06 |
| 7566519 | Carrier for electrophotographic developer, and electrophotographic developer using the same | Hiromichi Kobayashi, Tsuyoshi Itagoshi, Tomoyuki Suwa | 2009-07-28 |
| 7521163 | Resin-coated ferrite carrier for electrophotographic developer, its production method, and electrophotographic developer using the resin-coated ferrite carrier | Tetsuya Uemura, Kanao Kayamoto | 2009-04-21 |
| 7442483 | Ferrite carrier for electrophotographic developer and method for preparing the same, and electrophotographic developer using the same | Hiromichi Kobayashi, Kanao Kayamoto, Tadashi Harayama, Issei Shinmura | 2008-10-28 |
| 6124068 | Carrier for electrophotographic development and electrophotographic developer containing the same | Hiromichi Kobayashi, Yuji Sato | 2000-09-26 |
| 6071663 | Carrier for electrophotographic development and electrophotographic developer containing the same | Shinichi Matsuda, Yuji Sato, Hiromichi Kobayashi, Yasuhiko Kataoka, Tetsuya Uemura | 2000-06-06 |
| 5976747 | Ferrite carrier for electrophotographic developer and electrophotographic developer containing the same | Yuji Sato, Tsuyoshi Itagoshi, Kazunori Takagi, Norio Takei | 1999-11-02 |
| 5965317 | Regeneration of carrier and electrophotographic developer containing regenerated carrier | Yuji Sato, Tsuyoshi Itagoshi | 1999-10-12 |
| 5595850 | Ferrite carrier for electrophotographic developer and developer containing the carrier | Yuji Sato, Kanao Kayamoto, Masahiro Ogata, Hiromichi Kobayashi | 1997-01-21 |
| 5518849 | Ferrite carrier for electrophotographic developer and developer using said carrier | Yuji Sato, Masahiro Ogata, Kouichi Shimizu, Norio Takei | 1996-05-21 |
| 5491042 | Method for manufacturing a resin-coated carrier for an electrophotographic developer | Yuji Sato, Toshiyuki Fukumoto, Yoshifumi Imamura | 1996-02-13 |
| 5466552 | Ferrite carrier for electrophotographic developer and developer containing the carrier | Yuji Sato, Kanao Kayamoto, Masahiro Ogata, Kouichi Shimizu | 1995-11-14 |
| 5419994 | Carrier for electrophotographic developer, process for preparing the same and developer prepared by using said carrier | Yuji Sato, Kanao Kayamoto, Masahiro Ogata | 1995-05-30 |
| 5204204 | Carrier for developing electrostatic latent image | Yuji Shintani, Etsuaki Urano, Osamu Doi, Shinobu Nakasawa, Ichiro Demizu +6 more | 1993-04-20 |
| 4977054 | Developer for electrostatic image comprising coated carrier | Yuji Sato, Yoshihiro Fukushima, Masayoshi Nawa, Shinichiro Yasuda | 1990-12-11 |
| 4871639 | Carrier for electrophotographic developer | Takayoshi Aoki, Ikutaroh Nagatsuka, Masayuki Takeda, Kazuhiro Itoh, Kenji Uchida | 1989-10-03 |
| 4861694 | Process for producing carriers for developer | Takayoshi Aoki, Masayuki Takeda, Ikutaroh Nagatsuka, Kazuhiro Itoh, Kenji Uchida | 1989-08-29 |
| 4598034 | Ferrite carriers for electrophotographic development | Yukio Seki | 1986-07-01 |