Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8038179 | Threaded joint for steel pipes | Takahiro Takano, Shigeo Nagasaku, Masaaki Sugino, Suguru Yamaguchi | 2011-10-18 |
| 7900975 | Threaded joint for steel pipes | Keiichi Nakamura, Masaaki Sugino, Suguru Yamaguchi | 2011-03-08 |