Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8123909 | Apparatus for treating papermaking feedstock | Keigo Watanabe, Shisei Goto, Yohji Tuji, Takeshi Iimori | 2012-02-28 |
| 7384502 | Process for impregnating, refining, and bleaching wood chips having low bleachability to prepare mechanical pulps having high brightness | Yasuyuki Kamijo, Keigo Watanabe, Takanori Miyanishi | 2008-06-10 |