Issued Patents 2020
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10829614 | Composition, composition for downhole tools, degradable rubber member for downhole, downhole tool, and method for well drilling | Takuma Kobayashi, Hikaru Saijo, Fuminori Kobayashi | 2020-11-10 |
| 10815362 | Composition, composition for downhole tools, degradable rubber member for downhole, downhole tool, and method for well drilling | Takuma Kobayashi, Hikaru Saijo, Fuminori Kobayashi | 2020-10-27 |
| 10738561 | Stock shape for downhole tool component, downhole tool component, and downhole tool | Fuminori Kobayashi, Masayuki Okura | 2020-08-11 |
| 10619084 | Plug for well drilling provided with diametrically expandable annular rubber member formed from degradable rubber material | Masayuki Okura | 2020-04-14 |