Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5171724 | Magnesia-alumina type spinel clinker and method of producing refractory by using same | Takenao Hisamoto, Yoshio Yasuda, Katsunori Itoh, Mitsuteru Takemoto | 1992-12-15 |