Issued Patents 2003
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6647230 | Image-forming apparatus for use with negatively-charged toner and featuring a negatively-chargeable image-bearing member, and process cartridge using same | Tetsuya Kobayashi, Yasuyuki Ishii, Tsuyoshi Nakagawa | 2003-11-11 |
| 6574444 | Developing apparatus wherein seal-inflicted damage to an end edge of a developing roller is prevented | Tetsuya Kobayashi, Yasuyuki Ishii, Tsuyoshi Nakagawa | 2003-06-03 |
| 6542710 | Developing apparatus for preventing developer from attaching to developer electrifying member | Tomomi Kakeshita, Yasuyuki Ishii | 2003-04-01 |
| 6529699 | Image forming apparatus and process cartridge detachably attachable to image forming apparatus comprising an image bearing body, and a developer carrying body | Yasuyuki Ishii, Tetsuya Kobayashi, Tsuyoshi Nakagawa | 2003-03-04 |
| 6522842 | Developing apparatus and image forming apparatus | Yasuyuki Ishii, Tomomi Kakeshita | 2003-02-18 |