Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4954460 | Water-permeable ceramic material | Tohru Honda, Shigetoshi Ohta, Yoshiharu Kajita, Tatsushi Kachi | 1990-09-04 |
| 4849383 | Basic refractory composition | Toru Honda, Yoshiharu Kajita, Katsuhiko Kato, Keisuke Sakakibara | 1989-07-18 |
| 4389492 | Spinel-magnesia basic brick | — | 1983-06-21 |