Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7929870 | Image forming apparatus with a toner dispensing control unit | Shunichiro Shishikura, Naoya Yamasaki | 2011-04-19 |
| 7751731 | Image forming apparatus having a toner concentration sensor | Shigeru Tsukada, Shunichiro Shishikura, Naoya Yamasaki | 2010-07-06 |
| 7623799 | Image forming apparatus | Shunichiro Shishikura, Shigeru Tsukada, Naoya Yamasaki | 2009-11-24 |
| 7539426 | Image forming apparatus having a toner concentration sensor | Shigeru Tsukada, Shunichiro Shishikura, Naoya Yamasaki | 2009-05-26 |
| 7536116 | Image forming apparatus with a plurality of development devices | Naoya Yamasaki, Shunichiro Shishikura, Shigeru Tsukada | 2009-05-19 |
| 7400838 | Image forming apparatus with toner concentration detection unit | Naoya Yamasaki, Shunichiro Shishikura, Shigeru Tsukada | 2008-07-15 |
| 7389059 | Image forming apparatus having a toner concentration sensor | Shigeru Tsukada, Shunichiro Shishikura, Naoya Yamasaki | 2008-06-17 |
| 7366430 | Rotary-type developing device and image forming apparatus | Shunichiro Shishikura, Shigeru Tsukada, Naoya Yamasaki | 2008-04-29 |