Issued Patents All Time
Showing 26–32 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7623799 | Image forming apparatus | Shunichiro Shishikura, Shigeru Tsukada, Masayuki Aratake | 2009-11-24 |
| 7539426 | Image forming apparatus having a toner concentration sensor | Shigeru Tsukada, Shunichiro Shishikura, Masayuki Aratake | 2009-05-26 |
| 7536116 | Image forming apparatus with a plurality of development devices | Shunichiro Shishikura, Masayuki Aratake, Shigeru Tsukada | 2009-05-19 |
| 7400838 | Image forming apparatus with toner concentration detection unit | Masayuki Aratake, Shunichiro Shishikura, Shigeru Tsukada | 2008-07-15 |
| 7389059 | Image forming apparatus having a toner concentration sensor | Shigeru Tsukada, Shunichiro Shishikura, Masayuki Aratake | 2008-06-17 |
| 7366430 | Rotary-type developing device and image forming apparatus | Shunichiro Shishikura, Shigeru Tsukada, Masayuki Aratake | 2008-04-29 |
| 7174125 | Image forming apparatus | — | 2007-02-06 |