Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9783876 | Stainless steel for oil wells and stainless steel pipe for oil wells | Shinjiro Nakatsuka, Hisashi Amaya, Hideki Takabe, Yohei Otome, Yusaku Tomio +3 more | 2017-10-10 |
| 9322087 | Stainless steel for oil well, stainless steel pipe for oil well, and method of manufacturing stainless steel for oil well | Hideki Takabe, Kunio Kondo, Hisashi Amaya, Yohei Otome | 2016-04-26 |
| 9303296 | High-strength stainless steel for oil well and high-strength stainless steel pipe for oil well | Hisashi Amaya, Hideki Takabe, Kunio Kondo, Yohei Otome | 2016-04-05 |
| 9109268 | Stainless steel for oil well, stainless steel pipe for oil well, and method of manufacturing stainless steel for oil well | Hideki Takabe, Kunio Kondo, Hisashi Amaya, Yohei Otome | 2015-08-18 |
| 8608872 | High-strength stainless steel pipe excellent in sulfide stress cracking resistance and high-temperature carbonic-acid gas corrosion resistance | Kunio Kondo, Hisashi Amaya, Hideki Takabe | 2013-12-17 |
| 7799149 | Oil country tubular good for expansion in well and manufacturing method thereof | Keiichi Nakamura, Hideki Takabe, Toshiharu Abe, Tomoki Mori, Masakatsu Ueda | 2010-09-21 |