Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4749132 | Method for crushing massive furnace slag using a swingable type crushing apparatus | Tatsuo Hagiwara, Keiji Imai, Shigenori Nagaoka, Toshitsugu Kikuchi | 1988-06-07 |
| 4666591 | Slag disposal method | Keiji Imai, Shigenori Nagaoka, Shinji Kogumazaka, Takeshi Imagawa, Toshitsugu Kikuchi | 1987-05-19 |
| 4664321 | Shell structure of heavy-load type rod mill | Tatsuo Hagiwara, Keiji Imai, Shigenori Nagaoka, Shinji Kogumazaka, Kyoichi Yahagi +2 more | 1987-05-12 |
| 4645133 | Liner for the outlet port of a rod mill | Tatsuo Hagiwara, Keiji Imai, Shigenori Nagaoka, Shinji Kogumazaka, Kyoichi Yahagi +2 more | 1987-02-24 |