Issued Patents 2018
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10118978 | Vinyl alcohol polymer and production method thereof, additive for drilling mud, drilling mud, additive for drilling cement slurry, and drilling cement slurry | Yosuke Kumaki | 2018-11-06 |
| 10113933 | Leakage oil detector system and method | Li Lu, Toshiaki Rokunohe, Tomohiro Moriyama, Jun Nukaga, Akira YAMAGISHI | 2018-10-30 |
| 9898830 | Oil leakage detector and oil leakage detection method | Li Lu, Satoshi Ichimura, Tomohiro Moriyama, Jun Nukaga, Toshiaki Rokunohe +1 more | 2018-02-20 |