Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12344361 | Vessel propulsion apparatus, vessel, auxiliary machine-equipped engine, and torque fluctuation absorber | — | 2025-07-01 |
| 8091534 | Installation structure for compressor | — | 2012-01-10 |
| 8038491 | Boat | Shigeyuki Ozawa, Hitoshi Muramatsu, Yasukazu Toyama | 2011-10-18 |
| 7458868 | Small planing boat | — | 2008-12-02 |
| 6886529 | Engine control device for water vehicle | Akitaka Suzuki, Hitoshi Motose | 2005-05-03 |
| 6733350 | Engine output control for watercraft | Kazumi Iida, Masaki Takegami, Shigeyuki Ozawa, Mitsuyoshi Nakamura | 2004-05-11 |
| 6113446 | Exhaust arrangement for small watercraft | — | 2000-09-05 |
| 5983631 | Exhaust control for watercraft engine | — | 1999-11-16 |
| 5928044 | Exhaust system for an engine | — | 1999-07-27 |
| 5882236 | Exhaust system for small watercraft | Shigeyuki Ozawa | 1999-03-16 |
| 5827096 | Watercraft exhaust control | — | 1998-10-27 |
| 5536189 | Exhaust system for watercraft | — | 1996-07-16 |
| 5340344 | Air intake system | Kazuhiro Okuzawa | 1994-08-23 |
| 5324217 | Exhaust system for small boat | — | 1994-06-28 |
| 5251439 | Exhaust device for small sized boat engine | Ryoichi Nakase | 1993-10-12 |
| 5067448 | Exhaust cooling device for small sized boat engine | Ryoichi Nakase | 1991-11-26 |
| 4989409 | Exhaust device for small sized boat engine | Ryoichi Nakase | 1991-02-05 |