Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12054798 | Steel material and method for producing steel material | Yuji Arai, Shinji Yoshida, Hiroki Kamitani | 2024-08-06 |
| 11891680 | Steel material suitable for use in sour environment | Hiroki Kamitani, Atsushi Soma, Taro OE, Nobuaki Komatsubara, Yuji Arai +1 more | 2024-02-06 |
| 9783876 | Stainless steel for oil wells and stainless steel pipe for oil wells | Shinjiro Nakatsuka, Taro Ohe, Hisashi Amaya, Hideki Takabe, 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, Taro Ohe | 2016-04-26 |
| 9303296 | High-strength stainless steel for oil well and high-strength stainless steel pipe for oil well | Taro Ohe, Hisashi Amaya, Hideki Takabe, Kunio Kondo | 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, Taro Ohe | 2015-08-18 |
| 8071020 | High strength Cr-Ni alloy material and seamless pipe for oil well | Masaaki Igarashi, Hisashi Amaya, Hirokazu Okada | 2011-12-06 |