Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7947151 | Softening agent for paper and method for making paper by using same | Tetsuya Tamai, Yasuyuki Nakamura, Takashi Matsufuji | 2011-05-24 |
| 7344621 | Paper additive composition and method for producing paper using the same | Yasuyuki Nakamura, Tetsuya Tamai | 2008-03-18 |