Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4933024 | Method for manufacturing a high strength rail with good toughness | Kozo Fukuda, Tsunemi Wada, Ichiro Nakauchi, Shinichi Nagahashi, Yoshio Saito +4 more | 1990-06-12 |
| 4886558 | Method for heat-treating steel rail head | Akio Fujibayashi, Kozo Fukuda, Mashiro Ueda, Shinichi Nagahashi, Yazuru Kataoka +5 more | 1989-12-12 |