Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5169162 | Piston ring having a function which is for facilitating supply of lubricating oil into an annular groove of a piston | Takeo Takahashi | 1992-12-08 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5169162 | Piston ring having a function which is for facilitating supply of lubricating oil into an annular groove of a piston | Takeo Takahashi | 1992-12-08 |