Issued Patents 2018
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10006559 | Valve device | Toshikatsu Kubo, Akira Nakano, Akira Yamashita | 2018-06-26 |
| 9995406 | Valve device | Munetoshi Kuroyanagi, Akio Nakamura, Kazuo Haneda, Akira Yamashita, Masaaki Kondo | 2018-06-12 |
| 9945489 | Safety valve | Kunihiko Daido, Masashi Matsuoka, Akira Yamashita | 2018-04-17 |
| 9927817 | Throttle valve | Akio Nakamura, Akira Nakano, Akira Yamashita, Masaaki Kondo | 2018-03-27 |
| 9929417 | Valve device | Akio Nakamura, Takuya Suzuki, Akira Yamashita, Masaaki Kondo | 2018-03-27 |