Issued Patents All Time
Showing 25 most recent of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7174119 | Developing device featuring high viscosity developing agent and superimposed AC and DC bias voltage components | — | 2007-02-06 |
| 6850722 | Image forming apparatus | Koji Masuda, Keiko Igarashi, Tomoyuki Sakamaki, Kota Arimoto | 2005-02-01 |
| 6546222 | Developing apparatus | Keiko Igarashi, Tomoyuki Sakamaki | 2003-04-08 |
| 6459862 | Developing apparatus | Shigeo Kimura, Fumitake Hirobe | 2002-10-01 |
| 6418291 | Image forming apparatus in which carrier is carried from developing device to cleaning container | — | 2002-07-09 |
| 6088546 | Image forming apparatus with glossiness detection | Masahiro Inoue, Rie Saito, Jiro Ishizuka, Mitsuhiro Ota | 2000-07-11 |
| 5999777 | Image forming apparatus capable of temporarily breaking the contact between the developer and the photosensitive drum with use of electric field | Koji Masuda, Takao Ogata, Kazuhiro Hasegawa | 1999-12-07 |
| 5943088 | Image forming apparatus capable of controlling duration of light emission for each picture element | Hisashi Fukushima | 1999-08-24 |
| 5752140 | Developing device using development bias having oscillating part and a quiescent part | Toshimitsu Danzuka, Hisashi Fukushima, Takeshi Menjo | 1998-05-12 |
| 5752151 | Image forming apparatus having a cleaning blade with a tensile strength from 80 to 120 kg/cm.sup.2 | Masahiro Inoue | 1998-05-12 |
| 5669050 | Developing apparatus using blank pulse bias | Koji Amemiya, Takeshi Menjo, Masahiro Inoue, Masami Izumizaki | 1997-09-16 |
| 5581326 | Image forming apparatus which supplies toner based on counted signal value | Takao Ogata, Masami Izumizaki | 1996-12-03 |
| 5581336 | Developing device preventing scattering of developing agent by conductive member | Shigeru Matsuzaki, Masami Izumizaki, Toshimitsu Danzuka | 1996-12-03 |
| 5525752 | Developing apparatus | Masami Izumizaki, Koji Amemiya, Shigeru Ohki, Kunihiko Kitayama | 1996-06-11 |
| 5414497 | Powder conveying device | Hiroaki Tsuchiya, Keishi Ohsawa, Kenichiro Waki, Nobuyuki Ito, Takehiro Takano +1 more | 1995-05-09 |
| 5365319 | Image forming apparatus replenishing toner by detecting the ratio of toner and carrier and the density of the developer | Masami Izumizaki | 1994-11-15 |
| 5327339 | Image forming method | Kenichi Takeda | 1994-07-05 |
| 5313233 | Image forming apparatus | Yukio Nagase, Akira Watanabe, Masahiro Itoh, Kenichi Takeda, Kazuhisa Kemmochi | 1994-05-17 |
| 5296897 | Image forming apparatus for forming multi-image on transfer sheet with plural color toners | Koji Amemiya, Masami Izumizaki | 1994-03-22 |
| 5294967 | Image forming apparatus with a plurity of adjustable developing units | Atsushi Munakata, Masahiro Itoh, Akira Watanabe | 1994-03-15 |
| 5287148 | Magnetic seal for a developing apparatus | Masahiro Itoh, Akira Watanabe | 1994-02-15 |
| 5270484 | Powder conveying device | Hiroaki Tsuchiya, Keishi Ohsawa, Kenichiro Waki, Nobuyuki Ito, Takehiro Takano +1 more | 1993-12-14 |
| 5268709 | Image forming apparatus | Rie Saito | 1993-12-07 |
| 5267007 | Magnetic seal for preventing developer from leaking out of the longitudinal ends of a rotatable member | Akira Watanabe, Masahiro Itoh | 1993-11-30 |
| 5239343 | Developing apparatus with regulating member having magnetic and non-magnetic members | Hatsuo Tajima, Kenji Okado, Masahiro Inoue | 1993-08-24 |