Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5938378 | Apparatus for boring webs of steel sections | Shohei Omi, Taro Ishikawa | 1999-08-17 |
| 4189975 | Screwed connection having improved fatigue strength | Sinichi Nisida, Hiroki Masumoto | 1980-02-26 |