Issued Patents All Time
Showing 26–40 of 40 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11186885 | High-strength seamless steel pipe for oil country tubular goods, and production method for high-strength seamless steel pipe for oil country tubular goods | Mitsuhiro Okatsu, Hiroki Ota | 2021-11-30 |
| 11111566 | Low alloy high strength seamless steel pipe for oil country tubular goods | Mitsuhiro Okatsu, Hiroki Ota, Kazuki Fujimura | 2021-09-07 |
| 10975450 | Low alloy high strength thick-walled seamless steel pipe for oil country tubular goods | Mitsuhiro Okatsu, Kenichiro Eguchi, Haruo Nakamichi | 2021-04-13 |
| 10920297 | High-strength seamless steel pipe for oil country tubular goods and method of producing the same | Yasuhide Ishiguro, Mitsuhiro Okatsu, Seiji Nabeshima, Hiroki Ota | 2021-02-16 |
| 10876182 | High-strength seamless steel pipe for oil country tubular goods and method of producing the same | Yasuhide Ishiguro, Seiji Nabeshima, Mitsuhiro Okatsu, Hiroki Ota | 2020-12-29 |
| 10844453 | High-strength seamless steel pipe for oil country tubular goods and method of producing the same | Yasuhide Ishiguro, Seiji Nabeshima, Mitsuhiro Okatsu, Hiroki Ota | 2020-11-24 |
| 10662493 | Abrasion-resistant steel plate and method for manufacturing the same | Shinichi Miura, Akio Ohmori | 2020-05-26 |
| 10640856 | High-strength seamless steel pipe for oil country tubular goods and method of producing the same | Yasuhide Ishiguro, Mitsuhiro Okatsu, Kazuki Fujimura | 2020-05-05 |
| 10472690 | High-strength seamless steel pipe for oil country tubular goods and method of producing the same | Mitsuhiro Okatsu, Kazuki Fujimura, Yasuhide Ishiguro | 2019-11-12 |
| 10316385 | High-tensile-strength steel plate and process for producing same | Katsuyuki Ichimiya, Kazukuni Hase, Shigeru Endo | 2019-06-11 |
| 10300564 | Weld joint | Katsuyuki Ichimiya, Kazukuni Hase, Shigeru Endo | 2019-05-28 |
| 9995669 | Round bar tensile test specimen for sulfide stress corrosion cracking test of a steel, test method for sulfide stress corrosion cracking of steel, and seamless steel pipe having excellent resistance to sulfide stress corrosion cracking | Yasuhide Ishiguro, Kazuki Fujimura, Mitsuhiro Okatsu, Yoshiyuki Sugano | 2018-06-12 |
| 9945015 | High-tensile steel plate giving welding heat-affected zone with excellent low-temperature toughness, and process for producing same | Shigeki Kitsuya, Kenji Hayashi, Minoru Suwa | 2018-04-17 |
| 9790579 | High tensile strength steel plate having excellent weld heat-affected zone low-temperature toughness and method for producing same | Shigeki Kitsuya, Yusuke Terazawa, Minoru Suwa, Kenji Hayashi | 2017-10-17 |
| 9777358 | Thick-walled, high tensile strength steel with excellent CTOD characteristics of the weld heat-affected zone, and manufacturing method thereof | Katsuyuki Ichimiya, Kenji Hayashi | 2017-10-03 |