Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5507873 | Vertical boat | Yutaka Ishizuka, Yoshiyuki Watanabe, Shinzi Sawanobori, Tomio Kon | 1996-04-16 |
| 5492229 | Vertical boat and a method for making the same | Takashi Tanaka, Jun Yoshikawa, Eiichi Toya, Atsuo Kitazawa, Kazunori Meguro +4 more | 1996-02-20 |