Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5942147 | Submerged nozzle replacing device | Ryoichi Yoshino, Kenji Yamamoto | 1999-08-24 |
| 5879579 | Submerged nozzle change device | Ryoichi Yoshino, Kenji Yamamoto, Noritaka Hashimoto | 1999-03-09 |
| 5868954 | Method for joining immersion nozzle | Ryoichi Yoshino, Kenji Yamamoto | 1999-02-09 |
| 5688425 | Submerged nozzle changing apparatus | Kenji Yamamoto | 1997-11-18 |
| 5613545 | Inert gas injecting plate brick or insert nozzle brick for use in a sliding gate valve apparatus of molten metal | Takashi Otsuka, Kenji Yamamoto, Mototsugu Osada, Yoshifumi Shigeta | 1997-03-25 |
| 5316271 | Discharge regulator of molten metal | Takashi Otsuka, Kenji Yamamoto, Mototsugu Osada, Yoshifumi Shigeta | 1994-05-31 |
| 5238158 | Immersion nozzle exchanging apparatus | Kenji Yamamoto, Shigeru Ando, Mototsugu Osada | 1993-08-24 |
| 4840296 | Clamping and fixing apparatus for a refractory-made plate for a slide gate valve for controlling a molten steel flow | Takashi Otsuka, Masahiko Nose, Kenji Yamamoto, Yoshifumi Shigeta, Mototsugu Osada | 1989-06-20 |