Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6290919 | Electrostatic separating apparatus | Sadahiko Yokoyama, Masatoshi Iji, Tokukazu Kiji | 2001-09-18 |
| 6244445 | Moisturizing equipment | Sadahiko Yokoyama, Tokukazu Kiji | 2001-06-12 |
| 5217624 | Method for the disposal of aqueous sewage sludge | Isao Yamane, Toru Saito, Satoshi Kouchi | 1993-06-08 |
| 5133806 | Softy mud solidifying agent | Hiroyuki Sakamoto, Masao Sagara, Kitsugi Kyoichi | 1992-07-28 |
| 4650523 | Cement accelerating agent | Masatsune Kikuchi, Satoru Matsui, Hiroshi Omori | 1987-03-17 |