Issued Patents 2022
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11333245 | Oil control ring and spacer expander | Hiroshi Shimizu, Satoshi Koizumi, Shigeru Tokunaga, Yuichiro Takezawa | 2022-05-17 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11333245 | Oil control ring and spacer expander | Hiroshi Shimizu, Satoshi Koizumi, Shigeru Tokunaga, Yuichiro Takezawa | 2022-05-17 |