Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5178667 | Dry process for refining zinc sulfide concentrates | Nobumasa Kemori, Hitoshi Takano, Takeshi Kusakabe, Masaru Takebayashi | 1993-01-12 |
| 5174746 | Method of operation of flash smelting furnace | Nobumasa Kemori, Yasuhiro Kondou | 1992-12-29 |