Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11493146 | Opening and closing valve | Ryohei Yamamoto, Naoyuki Yamamoto | 2022-11-08 |
| D902354 | Valve for oil change or the like | Ryohei Yamamoto, Naoyuki Yamamoto | 2020-11-17 |
| D902353 | 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 |
| 10036476 | Opening and closing valve | Ryohei Yamamoto, Naoyuki Yamamoto | 2018-07-31 |
| D812194 | Oil extractor for automobiles | Ryohei Yamamoto, Naoyuki Yamamoto | 2018-03-06 |
| 9752702 | Valve for abnormal liquid | Ryohei Yamamoto, Naoyuki Yamamoto | 2017-09-05 |
| D790040 | Valve for oil change or the like | Ryohei Yamamoto | 2017-06-20 |
| D783777 | Valve for oil change or the like | Ryohei Yamamoto | 2017-04-11 |
| D783778 | Valve for oil change or the like | Ryohei Yamamoto | 2017-04-11 |
| 9605796 | Posture holding apparatus | Ryouhei Yamamoto, Naoyuki Yamamoto | 2017-03-28 |
| 9239129 | Holding force adjusting apparatus | Ryouhei Yamamoto, Naoyuki Yamamoto | 2016-01-19 |
| D730491 | Positioning tool for valve | Ryohei Yamamoto, Naoyuki Yamamoto | 2015-05-26 |
| D681171 | Valve for oil change or the like | — | 2013-04-30 |