Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11629916 | Graphite-containing refractory and method of producing graphite-containing refractory | Keisuke Yoshida, Yoichiro Hama | 2023-04-18 |
| 11156403 | Graphite-containing refractory and method of producing graphite-containing refractory | Keisuke Yoshida, Yoichiro Hama | 2021-10-26 |
| 6732547 | Method for the treating stainless steel refining slag | Chikashi Tada, Masato Kumagai, Toshikazu Sakuraya | 2004-05-11 |
| 6521040 | Method for processing chromium oxide-containing substances in large quantities, method for utilizing the processed substances, and products comprising the processed substances | Masato Kumagai, Hiroyuki Tobo, Yasuo Kishimoto, Toshikazu Sakuraya | 2003-02-18 |
| 6336967 | Method for processing chromium oxide-containing substances in large quantities, method for utilizing the processed substances, and products comprising the processed substances | Masato Kumagai, Hiroyuki Tobo, Yasuo Kishimoto, Toshikazu Sakuraya | 2002-01-08 |
| 6334885 | Method of solidifying steel-making slag and material produced by the method | Yasumasa Fukushima, Hiroyuki Tobo, Makiko Nakagawa, Masato Takagi, Masato Kumagai | 2002-01-01 |
| 6322622 | Flame-spraying powdery repair mixture | Masato Kumagai, Yasumasa Fukushima | 2001-11-27 |