Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5721296 | Asphalt additive and asphalt composition | Shingo Tanaka, Ryoichi Tamaki, Hitoshi Funada, Takao Taniguchi, Hirotaka SASAKI | 1998-02-24 |
| 5137577 | Cement additive | Masanori Iizuka, Fuzio Yamato, Toshiharu Kojima, Akitoshi Tuji | 1992-08-11 |
| 4963190 | Dispersant composition for cement | Ryoichi Tamaki, Shoji Kanzaki, Yoshiaki Tanisho, Fuzio Yamato | 1990-10-16 |
| 4759802 | Cement dispersion agent | Yasusuke Ochi, Kimio Kurosaka, Tatsuo Izumi, Shuichi Fujita | 1988-07-26 |