Issued Patents 2018
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10125554 | Threaded joint for oil country tubular goods | Takamasa Kawai, Kazunari Takahashi, Hiroshi Chikatsune, Masaki Yoshikawa, Jun Takano +4 more | 2018-11-13 |
| 9982491 | Threaded joint for oil country tubular goods | Takamasa Kawai, Kazunari Takahashi, Hiroshi Chikatsune, Masaki Yoshikawa, Jun Takano +1 more | 2018-05-29 |
| 9982815 | Threaded joint for oil country tubular goods | Takamasa Kawai, Kazunari Takahashi, Hiroshi Chikatsune, Masaki Yoshikawa, Jun Takano +4 more | 2018-05-29 |