Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4749132 | Method for crushing massive furnace slag using a swingable type crushing apparatus | Tatsuo Hagiwara, Keiji Imai, Hidenaga Ishii, Toshitsugu Kikuchi | 1988-06-07 |
| 4723716 | Operational control method for cylindrical crusher | Tatsuo Hagiwara, Keiji Imai, Kyoichi Yahagi | 1988-02-09 |
| 4666591 | Slag disposal method | Keiji Imai, Shinji Kogumazaka, Takeshi Imagawa, Hidenaga Ishii, Toshitsugu Kikuchi | 1987-05-19 |
| 4664321 | Shell structure of heavy-load type rod mill | Tatsuo Hagiwara, Keiji Imai, Shinji Kogumazaka, Kyoichi Yahagi, Takeshi Imagawa +2 more | 1987-05-12 |
| 4645133 | Liner for the outlet port of a rod mill | Tatsuo Hagiwara, Keiji Imai, Shinji Kogumazaka, Kyoichi Yahagi, Takeshi Imagawa +2 more | 1987-02-24 |
| 4637562 | Rocking slag breaker | Tatsuo Hagiwara, Keiji Imai | 1987-01-20 |