Issued Patents 2020
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10738561 | Stock shape for downhole tool component, downhole tool component, and downhole tool | Fuminori Kobayashi, Takeo Takahashi | 2020-08-11 |
| 10626694 | Downhole tool member for hydrocarbon resource recovery | Hikaru Saijo, Katsumi Yoshida, Hiroyuki Sato | 2020-04-21 |
| 10619084 | Plug for well drilling provided with diametrically expandable annular rubber member formed from degradable rubber material | Takeo Takahashi | 2020-04-14 |