Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12264376 | Duplex stainless steel and method for manufacturing same, and duplex stainless steel pipe | Kenichiro Eguchi, Yusuke Yoshimura, Masao Yuga | 2025-04-01 |
| 12157937 | Duplex stainless steel seamless pipe and method for manufacturing same | Shunsuke Sasaki, Tatsuro Katsumura, Hiroki Ota, Masao Yuga | 2024-12-03 |
| 11193179 | Seamless stainless steel pipe for oil country tubular goods and method of manufacturing the same | Yasuhide Ishiguro, Seigo Goto | 2021-12-07 |
| 11111566 | Low alloy high strength seamless steel pipe for oil country tubular goods | Mitsuhiro Okatsu, Masao Yuga, Hiroki Ota | 2021-09-07 |
| 10876183 | High-strength seamless stainless steel pipe and method of manufacturing high-strength seamless stainless steel pipe | Kenichiro Eguchi, Yasuhide Ishiguro, Takeshi Suzuki, Hiroki Ota | 2020-12-29 |
| 10640856 | High-strength seamless steel pipe for oil country tubular goods and method of producing the same | Masao Yuga, Yasuhide Ishiguro, Mitsuhiro Okatsu | 2020-05-05 |
| 10472690 | High-strength seamless steel pipe for oil country tubular goods and method of producing the same | Masao Yuga, Mitsuhiro Okatsu, Yasuhide Ishiguro | 2019-11-12 |
| 10329633 | High-strength seamless stainless steel pipe for oil country tubular goods and method for manufacturing the same | Yasuhide Ishiguro, Tetsu Nakahashi, Hideo Sato | 2019-06-25 |
| 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 | Masao Yuga, Yasuhide Ishiguro, Mitsuhiro Okatsu, Yoshiyuki Sugano | 2018-06-12 |