Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12291988 | V-type engine, outboard motor, and ship | Hirosuke Niwa, Hayate Araki | 2025-05-06 |
| 12228058 | V-type engine, outboard motor, and ship | Hirosuke Niwa, Hayate Araki | 2025-02-18 |
| 12158091 | V-type engine, outboard motor, and watercraft | Hirosuke Niwa, Hayate Araki | 2024-12-03 |
| 11555426 | Internal combustion engine | — | 2023-01-17 |
| 11143139 | Engine device | Masashi Kai | 2021-10-12 |
| 11041417 | Internal combustion engine | — | 2021-06-22 |
| 10227902 | Overhead camshaft engine | — | 2019-03-12 |
| 10030547 | Overhead camshaft engine | — | 2018-07-24 |
| 8950547 | Engine muffler | Hiroko Murakami, Hiroshi Mizuguchi, Yoshinobu Kondo | 2015-02-10 |
| 8813715 | Vertical engine | Akihito Kasai, Naohiro Ikeda | 2014-08-26 |
| 8701623 | Multi-link, adjustable-stroke type engine | Kotaro Sugi | 2014-04-22 |
| 8430076 | Engine | Manabu Hashimoto, Souhei Honda | 2013-04-30 |
| 8210137 | Link type variable stroke engine | Yoshikazu Sato | 2012-07-03 |
| 8171899 | Link type variable stroke engine | Sei Watanabe, Gaku Naoe | 2012-05-08 |
| 8161922 | Link type variable stroke engine | Sei Watanabe | 2012-04-24 |
| 8161923 | Link type variable stroke engine | Sei Watanabe, Yoshikazu Yamada | 2012-04-24 |
| 8136501 | Variable stroke engine | Sei Watanabe | 2012-03-20 |
| 8127739 | Variable stroke engine | Sei Watanabe | 2012-03-06 |
| 7878165 | Engine valve operating system | — | 2011-02-01 |
| 7661395 | Stroke-variable engine | Sei Watanabe, Gaku Naoe | 2010-02-16 |