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, Masafumi Ikeyama +5 more | 2003-01-21 |
| 6318286 | Hull shape of personal watercraft | Takehiro Nakashima, Mitsuhiro Yazaki, Kanji Kiyohara, Hisashi Fujii | 2001-11-20 |
| 6237522 | Bottom structure of personal watercraft | Kanji Kiyohara, Mitsuhiro Yazaki, Takehiro Nakashima, Hisashi Fujii, Takeshi Sugawara | 2001-05-29 |
| D425011 | Hull for a motorboat | Takehiro Nakashima | 2000-05-16 |
| 5588388 | Hull shape of small watercraft | Shin Ogata, Yoshinori Tsumiyama | 1996-12-31 |
| D369137 | Hull for a motorboat | Shin Ogata, Yoshinori Tsumiyama | 1996-04-23 |