Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6610767 | Antistatic inorganic filler, resin composition containing the filler and method for preparing the inorganic filler | Seiji Katayama, Ryoji Itoh, Toshiaki Matsushige, Koji Mita | 2003-08-26 |
| 6402831 | Concrete containing aqueous slurry of ground calcium carbonate | Haruya Sawara, Tadashi Yamauchi, Hidetoshi Morishita, Seiji Katayama | 2002-06-11 |