Issued Patents 2020
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D902353 | Valve for oil change or the like | Ryohei Yamamoto, Naoyuki Yamamoto | 2020-11-17 |
| D902354 | Valve for oil change or the like | Ryohei Yamamoto, Naoyuki Yamamoto | 2020-11-17 |
| D884836 | Valve for oil change or the like | Ryohei Yamamoto | 2020-05-19 |