Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8626013 | Recording material detection apparatus and image forming apparatus | Norio Matsui, Shoichi Koyama, Tsutomu Ishida | 2014-01-07 |
| 8594517 | Color image forming apparatus having function of obtaining color information of patch | Masatake Usui, Hiroshi Kita, Ken Yokoyama | 2013-11-26 |
| 8582116 | Recording sheet surface detection apparatus and image forming apparatus | Tsutomu Ishida, Shoichi Koyama, Norio Matsui | 2013-11-12 |
| 8335443 | Recording medium imaging device and image forming apparatus | Shoichi Koyama, Tsutomu Ishida, Norio Matsui | 2012-12-18 |