Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5104633 | Method for producing high-purity metallic silicon and apparatus therefor | Yasuhiko Sakaguchi, Fukuo Aratani, Mitsugi Yoshiyagawa, Kunio Miyata, Masato Ishizaki +1 more | 1992-04-14 |
| 4830836 | Metal stripping system and an operation process therefor | Toshio Watanabe, Yoshio Nakazato, Minoru Hoshino, Akira Yamamoto, Kanji I | 1989-05-16 |
| 4565675 | Process for treating and recovering pickling waste liquids for stainless steel | Toshio Watanabe, Yoshio Nakazato, Minoru Hoshino, Noboru Ishihara | 1986-01-21 |