Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5079303 | Surface treatment agent for paper | Toshiyuki Hakata, Tsugumi Ikegaya | 1992-01-07 |
| 4943608 | Rosin emulsion sizing agent | Mizunori Takahashi, Yoshiharu Yamaguchi | 1990-07-24 |