Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8696834 | Method for manufacturing seamless pipes | Keiichi Kondo, Kunio Kondo, Yuichi Yano, Yuji Arai | 2014-04-15 |
| 7799149 | Oil country tubular good for expansion in well and manufacturing method thereof | Taro Ohe, Keiichi Nakamura, Hideki Takabe, Tomoki Mori, Masakatsu Ueda | 2010-09-21 |
| 6958099 | High toughness steel material and method of producing steel pipes using same | Shigeru Nakamura, Kaori Kawano, Tomohiko Omura | 2005-10-25 |
| 6692592 | Method for manufacturing high chromium system seamless steel pipe | Shigeru Kidani, Koichi Ikeda | 2004-02-17 |