Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6106726 | Method of treating sludge containing arsenic | Hiroshi Fujita, Koosoo Tao, Taku Shimizu | 2000-08-22 |
| 5840194 | Process for treating arsenic-containing waste water | Hiroshi Fujita, Koosoo Tao, Hiroshi Baba, Hideki Kamiyoshi, Ranko Shikai | 1998-11-24 |