Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7272354 | Cleaning unit and image forming apparatus having multiple cleaning blades | Eisaku Murakami, Masami Tomita, Masanori Kawasumi, Toshio Koike, Naohiro Kumagai +11 more | 2007-09-18 |
| 7110696 | Cleaning unit, process cartridge, and image forming apparatus | Eisaku Murakami, Masami Tomita, Masanori Kawasumi, Toshio Koike, Naohiro Kumagai +11 more | 2006-09-19 |
| 6512901 | Method and apparatus for image forming capable of preventing a contamination of a brush-roller charger | — | 2003-01-28 |
| 6033818 | Developing device for an image forming apparatus | Toshihiro Sugiyama, Kazuhiro Yuasa, Shuichi Endoh, Iwao Matsumae, Yoshiaki Tanaka +6 more | 2000-03-07 |
| 6022660 | Developer, process cartridge and electrophotographic image forming apparatus that employs the developer and process cartridge | — | 2000-02-08 |
| 5897243 | Electrophotographic recording apparatus configured to switch a bias voltage in a developing unit | Satoru Komatsubara, Kazuhiro Yuasa, Eiji Takenaka, Toshihiro Sugiyama, Tetsuo Yamanaka +1 more | 1999-04-27 |
| 5879752 | Method of coating a toner conveyor roller | Eisaku Murakami, Kazuhiro Yuasa, Shuichi Endoh, Iwao Matsumae, Yoshiaki Tanaka +6 more | 1999-03-09 |
| 5845183 | Developing device for an image forming apparatus | Toshihiro Sugiyama, Kazuhiro Yuasa, Shuichi Endoh, Iwao Matsumae, Yoshiaki Tanaka +6 more | 1998-12-01 |
| 5826144 | Developing device for an electrophotographic recording apparatus including bias control of a toner supplying roller | Eiji Takenaka, Kazuhiro Yuasa, Shuichi Endoh, Iwao Matsumae, Yoshiaki Tanaka +6 more | 1998-10-20 |
| 5768665 | Image forming apparatus with bias control to prevent undesirable toner deposition | Tetsuo Yamanaka, Kazuhiro Yuasa, Shuichi Endoh, Iwao Matsumae, Yoshiaki Tanaka +6 more | 1998-06-16 |
| 5708942 | Developing device for an image forming apparatus | Toshihiro Sugiyama, Kazuhiro Yuasa, Shuichi Endoh, Iwao Matsumae, Yoshiaki Tanaka +6 more | 1998-01-13 |
| 5697026 | Developing device having the lengths of two toner transporting rollers and an image bearing member in specific relationships | Iwao Matsumae, Kazuhiro Yuasa, Shuichi Endoh, Yoshiaki Tanaka, Hiroshi Hosokawa +6 more | 1997-12-09 |
| 5625438 | Toner, and devices for electrostatically depositing a uniform application thereof | Toshihiro Sugiyama, Kazuhiro Yuasa, Shuichi Endoh, Iwao Matsumae, Yoshiaki Tanaka +6 more | 1997-04-29 |
| 5625440 | Developing device having seals between a toner transport roller and the toner hopper which prevent toner leakage and scattering | Iwao Matsumae, Kazuhiro Yuasa, Shuichi Endoh, Yoshiaki Tanaka, Hiroshi Hosokawa +6 more | 1997-04-29 |
| 5625441 | Developing device for an image forming apparatus | Toshihiro Sugiyama, Kazuhiro Yuasa, Shuichi Endoh, Iwao Matsumae, Yoshiaki Tanaka +6 more | 1997-04-29 |
| 5617191 | Toner conveyor roller and image forming apparatus having the same | Eisaku Murakami, Kazuhiro Yuasa, Shuichi Endoh, Iwao Matsumae, Yoshiaki Tanaka +6 more | 1997-04-01 |
| 5617190 | Developing device for an image forming apparatus which reduces toner consumption and waste | Eiji Takenaka | 1997-04-01 |
| 5610693 | Developing device for an image forming apparatus | Toshihiro Sugiyama, Kazuhiro Yuasa, Shuichi Endoh, Iwao Matsumae, Yoshiaki Tanaka +6 more | 1997-03-11 |
| 5552870 | Developing device for an image forming apparatus | Eisaku Murakami, Kazuhiro Yuasa, Shuichi Endoh, Iwao Matsumae, Yoshiaki Tanaka +6 more | 1996-09-03 |
| 5489747 | Developing device for an image forming apparatus | Eiji Takenaka, Kazuhiro Yuasa, Shuichi Endoh, Iwao Matsumae, Yoshiaki Tanaka +6 more | 1996-02-06 |
| 5486909 | Developing device for an image forming apparatus | Eiji Takenaka, Kazuhiro Yuasa, Shuichi Endoh, Iwao Matsumae, Yoshiaki Tanaka +6 more | 1996-01-23 |