Issued Patents All Time
Showing 26–26 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7149439 | Method and device for estimating toner concentration and image forming apparatus equipped with such device | Katsuyuki Hirata, Tetsuya Sakai, Tatsuya Isono, Hironori Akashi, Toshio Tsuboi +1 more | 2006-12-12 |