Issued Patents 2016
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9410625 | Combined oil control ring | Masahiro Nakazawa, Satoshi Koizumi | 2016-08-09 |
| 9353864 | Oil ring for internal combustion engine | Yunzhi Gao, Junichi Takahashi, Gyo Muramatsu, Ryo Obara, Tetsuji Miyashita | 2016-05-31 |