Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6585880 | Method for recovering chemicals in a process of producing pulp by kraft process | Keigo Watanabe, Yasunori Nanri, Kazuaki Sakai, Makoto Nakao | 2003-07-01 |
| 6517699 | Method for producing polysulfides by means of electrolytic oxidation | Tetsuji Shimohira, Junji Tanaka, Keigo Watanabe, Yasunori Nanri | 2003-02-11 |