Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5866490 | Monolithic refractory and gunning material using the refractory | Akira Watanabe, Hirokuni Takahashi, Shigeyuki Takanaga | 1999-02-02 |
| 5000427 | Injection material for use in blast furnace | Takeshi Iba, Junji Kariya, Yoshichika Yanagibashi, Masaaki Koba, Akira Watanabe +2 more | 1991-03-19 |