Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8729190 | Particular water-absorbent agent having water-absorbent resin as main component | Takahiro Kitano, Katsuyuki Wada | 2014-05-20 |
| 8729191 | Production process of polyacrylic acid (salt) water-absorbent resin | Hirotama Fujimaru, Kunihiko Ishizaki, Katsuyuki Wada | 2014-05-20 |
| 8546492 | Surface treatment method for water-absorbing resin and production method for water-absorbing resin | Atsushi Motoyama, Seiji Kato, Makoto Matsumoto, Yoshio Irie | 2013-10-01 |
| 7201941 | Process for production of surface-treated particulate water-absorbent resin | Yoshio Irie | 2007-04-10 |
| 5176869 | Method of manufacturing an inner lined pipe | Hiroshi Okamoto, Toshiyuki Tsujiuchi, Hidenori Katayama | 1993-01-05 |
| 5098628 | Centrifugal molding method for composite pipe having a resin concrete layer | Hiroshi Okamoto, Toshiyuki Tsujiuchi, Hidenori Katayama | 1992-03-24 |