Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5363106 | Method for evaluating internal quality of fused cast refractories | Yukihiro Ushimaru, Akinori Samejima | 1994-11-08 |
| 4460524 | Method for heating a riser of molten refractory material | Shiro Takahashi, Yoshio Nakagawa | 1984-07-17 |
| 4383963 | Process for annealing heat fused cast refractory product | Koji Ohashi, Toshio Kitamura | 1983-05-17 |
| 4348485 | Spinel type fused refractory product | Koji Oohasi, Toshio Kitamura, Eiichi Kudo | 1982-09-07 |