Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5855699 | Method for manufacturing welded clad steel tube | Motoaki Oyama, Minoru Yuzuki, Yuko Takeuchi, Hitoshi Hayakawa | 1999-01-05 |
| 4900248 | Skid rail | Susumu Isobe, Kenji Tsukuda, Hisao Inoue, Hiroshi Kobayashi | 1990-02-13 |