Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7056418 | Cooking method for pulp | Junji Tanaka, Keigo Watanabe, Yasunori Nanri, Makoto Nakao | 2006-06-06 |
| 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 |
| 6264819 | Method for producing polysulfide by electrolytic oxidation | Junji Tanaka, Tetsuji Shimohira | 2001-07-24 |
| 5972197 | Method for producing polysulfides by electrolytic oxidation | Tetsuji Shimohira, Eiji Endoh | 1999-10-26 |