Issued Patents All Time
Showing 51–67 of 67 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6125243 | Toner replenishing and developer replacing device for a developing unit of an image forming apparatus | Hisashi Shoji, Kiyotaka Ohta, Nobuto Yokokawa, Kiyonori Tsuda, Satoshi Hatori | 2000-09-26 |
| 6081684 | Method and apparatus for image forming capable of performing an improved circulation of developer | Yoshiko Naganuma | 2000-06-27 |
| RE36301 | Image forming apparatus having rotatable electrophotographic process unit | Masayuki Ohtani, Takaaki Yanagisawa, Hisashi Ishijima, Masaaki Nagano | 1999-09-14 |
| 5915155 | Toner replenishing and developer replacing device for a developing unit of an image forming apparatus | Hisashi Shoji, Kiyotaka Ohta, Nobuto Yokokawa, Kiyonori Tsuda, Satoshi Hatori | 1999-06-22 |
| 5774772 | Toner cartridge having a toner stirring member | Yoshiko Ishii, Nobuto Yokokawa | 1998-06-30 |
| 5638159 | Developing unit for an image forming apparatus and method of collecting bicomponent developer therefrom | Nobuo Iwata, Hidetoshi Yano, Yasushi Nakazato, Satoshi Muramatsu, Yoshiko Ishii +2 more | 1997-06-10 |
| 5619316 | Image forming apparatus | Hisashi Shoji, Hidetoshi Yano, Yoshiko Ishii, Nobuto Yokokawa, Masako Suzuki +1 more | 1997-04-08 |
| 5606408 | Image forming apparatus and cleaning device therefor | Hidetoshi Yano, Hisashi Shoji, Osamu Endo, Yoshiko Ishii, Nobuto Yokokawa +5 more | 1997-02-25 |
| 5598254 | Cartridge for replenishing two-ingredient developer to an image forming apparatus and a replenishing device using the same | Masumi Ikesue, Hidetoshi Yano, Nobuto Yokokawa | 1997-01-28 |
| 5555469 | Image forming apparatus having toner recycling device with electrostatic conveyor | Fumihiko Ishikawa, Seiji Oka | 1996-09-10 |
| 5442430 | Color image forming apparatus and cleaning device therefor | Yoshiko Ishii, Shigeru Yoshiki | 1995-08-15 |
| 5416568 | Developing unit for an image forming apparatus | Shigeru Yoshiki, Seiji Oka, Tomoji Ishikawa | 1995-05-16 |
| 5367363 | Image forming apparatus having rotatable electrophotographic process unit | Masayuki Ohtani, Takaaki Yanagisawa, Hisashi Ishijima, Masaaki Nagano | 1994-11-22 |
| 5323214 | Image forming apparatus having an electrostatic actuator | — | 1994-06-21 |
| 5255059 | Image forming apparatus | Seiji Oka, Hidetoshi Yano, Shigeru Yoshiki, Tsuyoshi Deki | 1993-10-19 |
| 5235384 | Image forming apparatus with replaceable process units | Seiji Oka, Tomoji Ishikawa, Hisashi Ishijima, Makoto Obu, Hidetoshi Yano | 1993-08-10 |
| 5109254 | Developing apparatus | Seiji Oka, Masaru Tanaka, Tomoji Ishikawa | 1992-04-28 |