Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4780434 | Refractory composition | Takashi Watanabe, Yoshihisa Kato, Kazuhide Kawai, Satoshi Doro, Takafumi NISHIBE +1 more | 1988-10-25 |
| 4667858 | Filler material for filling an outlet aperture of a casting ladle or similar container and a process for producing the filler material | Takahiro Katayose | 1987-05-26 |
| 4632283 | Molten metal discharging device | Kazumi Arakawa, Masuo Sugie, Takashi Watanabe, Toshio Kawamura, Tsutomu Nagahata +1 more | 1986-12-30 |
| 4583721 | Molten metal discharging device | Kazumi Arakawa, Masuo Sugie, Takashi Watanabe, Toshio Kawamura, Tsutomu Nagahata +1 more | 1986-04-22 |