Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8778143 | Silicon purification method and silicon purification device | Hiroshi Nagata | 2014-07-15 |
| 8454920 | Silicon purification method | — | 2013-06-04 |
| 8409319 | Silicon purification method | Youichi Hirose, Hiroshi Nagata | 2013-04-02 |
| 8404016 | Method for refining metal | Youichi Hirose, Hiroshi Nagata | 2013-03-26 |