Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6508187 | Watercraft | Kiyoaki Maeda, Yoshinori Tsumiyama, Takehiro Nakashima, Kanji Kiyohara, Haruyoshi Maruyama +5 more | 2003-01-21 |
| D448719 | Seat bottom for vehicles and watercraft | Yoshinori Tsumiyama, Tomohiro Kanazawa, Masafumi Ikeyama | 2001-10-02 |