Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12312552 | Agent for forming solid lubricating coating film, oil country tubular goods, threaded joint for oil country tubular goods, and method for manufacturing oil country tubular goods | Yasuhide Ishiguro, Takashi Koga, Takamasa Kawai, Seiji Ozaki, Hideo Sato +6 more | 2025-05-27 |
| 12110992 | Threaded joint of pipe and method for connecting same | Masaki Yoshikawa, Seiji Ozaki, Hideo Sato | 2024-10-08 |
| 11905765 | Threaded joint for pipes | Jun Takano, Takamasa Kawai, Takuya Nagahama, Masaki Yoshikawa, Tsuyoshi Yoneyama | 2024-02-20 |
| 11353144 | Threaded joint | Takamasa Kawai, Taro Kanayama, Masaki Yoshikawa, Tsuyoshi Yoneyama | 2022-06-07 |
| 11193179 | Seamless stainless steel pipe for oil country tubular goods and method of manufacturing the same | Kazuki Fujimura, Yasuhide Ishiguro | 2021-12-07 |