Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9593796 | Hot-dip galvanized steel pipe and method of manufacturing the same | Kouichi Okamoto, Hiroshi Takebayashi | 2017-03-14 |
| 5887788 | Steel pipe connector of ladder-type sleeper for railway track | Hajime Wakui, Hiromi Inoue, Saburo Inoue | 1999-03-30 |
| 5737956 | Method for manufacturing a force-receiving plate for friction device | Shigeo Takahashi, Tatsuo Ohhashi, Hirotaka Ito | 1998-04-14 |
| 5617941 | Force-receiving plate for friction device | Shigeo Takahashi, Tatsuo Ohhashi, Hirotaka Ito | 1997-04-08 |