Issued Patents All Time
Showing 26–42 of 42 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6947681 | Image forming apparatus with two-speed developing operation and toner control feature | — | 2005-09-20 |
| 6456803 | Image forming apparatus capable of detecting both of regularly reflected light and irregularly reflected light | Kazuo Suzuki, Nobuhiko Zaima | 2002-09-24 |
| 6442355 | Developer density controlling apparatus including target density information detection and toner image density detection | Kazuhiro Hasegawa, Shigeo Kimura, Koji Masuda, Akihiko Sato, Fumitake Hirobe | 2002-08-27 |
| 6421520 | Developing apparatus having magnetic lower limit domain between repulsion magnetic fields | Koji Masuda, Shigeo Kimura, Kazuhiro Hasegawa | 2002-07-16 |
| 6075954 | Toner density control device | Kazuhiro Hasegawa | 2000-06-13 |
| 6067433 | Developing apparatus for regulating the amount of developer in the vicinity of repulsive magnetic pole | Shigeo Kimura, Koji Masuda, Kazuhiro Hasegawa | 2000-05-23 |
| 5999777 | Image forming apparatus capable of temporarily breaking the contact between the developer and the photosensitive drum with use of electric field | Koji Masuda, Yuji Sakemi, Kazuhiro Hasegawa | 1999-12-07 |
| 5722007 | Image forming apparatus having detection means for detecting density of developer | Takeshi Menjo, Kazuo Suzuki | 1998-02-24 |
| 5697012 | Method and apparatus for color image formation with gradation control capability | Nobuatsu Sasanuma, Koji Amemiya, Tatsuo Takeuchi, Hisashi Fukushima, Haruhiko Moriguchi | 1997-12-09 |
| 5636010 | Image forming apparatus having a plurality of developing means | Toshimitsu Danzuka, Takeshi Menjo | 1997-06-03 |
| 5581326 | Image forming apparatus which supplies toner based on counted signal value | Yuji Sakemi, Masami Izumizaki | 1996-12-03 |
| 5559587 | Image forming apparatus | Takeshi Menjo | 1996-09-24 |
| 5548378 | Image operating apparatus providing image stabilization control | Koji Amemiya, Tatsuo Takeuchi, Takashi Hasegawa, Rie Saito, Nobuatsu Sasanuma | 1996-08-20 |
| 5469244 | Developing agent density control method of varying development bias in density control | Takeshi Menjo | 1995-11-21 |
| 5414531 | Image forming control based on a stored operation condition | Koji Amemiya, Akio Suzuki, Tatsuo Takeuchi, Hisashi Fukushima, Takashi Hasegawa +3 more | 1995-05-09 |
| 5258783 | Image processing method and apparatus with gamma-correction control | Nobuatsu Sasanuma, Koji Amemiya, Tatsuo Takeuchi | 1993-11-02 |
| 5253018 | Toner image density detecting mechanism for image forming apparatus | Tatsuo Takeuchi, Koji Amemiya, Nobuatsu Sasanuma | 1993-10-12 |