Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6915864 | Cutter structure for shield machine | Hiroyuki Itou, Yuuichi Asai, Osamu Takagi, Fumio Kondou, Hidetoshi Sakamoto | 2005-07-12 |
| 6698844 | Earth discharging device for upward-facing shield machine | Hiroyuki Itou, Yuuichi Asai, Osamu Takagi, Fumio Kondou, Hidetoshi Sakamoto | 2004-03-02 |