Issued Patents 2017
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9714551 | Plug for well drilling process provided with mandrel formed from degradable material | Takeo Takahashi | 2017-07-25 |
| 9644453 | Ball sealer for hydrocarbon resource collection as well as production method therefor and downhole treatment method using same | Hiroyuki Sato | 2017-05-09 |
| 9574418 | Downhole tool member for hydrocarbon resource recovery | Hikaru Saijo, Katsumi Yoshida, Hiroyuki Sato | 2017-02-21 |