Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8349135 | Papermaking additive and filled paper | Kazunari Sakai, Yoshiharu Hashiguchi, Takashi Yamaguchi, Masaki Ito, Yasunobu Ooka | 2013-01-08 |
| 7988826 | Cationic surface sizing agent and paper coated with the same | Kazushige Inaoka, Yoshiharu Hashiguchi | 2011-08-02 |
| 5399660 | Sizing agent composite for papermaking | Sadayuki Uchida, Yoshihide Ishikawa, Masao Hamada, Shinichi Kimura, Satoru Iwasa | 1995-03-21 |
| 5201944 | Size composition for papermaking | Hirofumi Aoki, Shoichi Yano, Yoshihide Ishikawa, Masao Hamada | 1993-04-13 |