Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6915864 | Cutter structure for shield machine | Hiroyuki Itou, Yuuichi Asai, Osamu Takagi, Kazuo Takamizawa, Hidetoshi Sakamoto | 2005-07-12 |
| 6698844 | Earth discharging device for upward-facing shield machine | Hiroyuki Itou, Yuuichi Asai, Osamu Takagi, Kazuo Takamizawa, Hidetoshi Sakamoto | 2004-03-02 |
| 4581818 | Apparatus for die-assisted squeeze-forming, including die structure with relatively movable die parts for accomodating variously sized or shaped workpieces | Kazuyori Sakakibara, Masataka ONO | 1986-04-15 |