Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6508187 | Watercraft | Kiyoaki Maeda, Yoshinori Tsumiyama, Takehiro Nakashima, Kanji Kiyohara, Haruyoshi Maruyama +5 more | 2003-01-21 |
| 6308650 | Hatch cover structure for personal watercraft | Yoshinori Tsumiyama, Kenichi Nakagawa | 2001-10-30 |
| D448719 | Seat bottom for vehicles and watercraft | Yoshinori Tsumiyama, Tomohiro Kanazawa, Haruki Okada | 2001-10-02 |
| 6227130 | Seat lock device | Yoshinori Tsumiyama, Tomohiro Kanazawa | 2001-05-08 |
| 6183318 | Reverser for watercraft | Yoshinori Tsumiyama, Kenichi Nakagawa, Tomohiro Kanazawa | 2001-02-06 |
| 6179672 | Locking mechanism of deflector for watercraft | Yoshinori Tsumiyama, Kenichi Nakagawa, Tomohiro Kanazawa | 2001-01-30 |