Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6027145 | Joint for steel pipe having high galling resistance and surface treatment method thereof | Eiji Tsuru, Masaharu Oka, Haruyuki Nagayoshi, Akira Nakashima, Seijun Higuchi +2 more | 2000-02-22 |