Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6159064 | Swimming fin | Minoru Takeuchi, Yoshiharu Takizawa, Haruo Kawashima | 2000-12-12 |
| 6029284 | Swimming goggles | Haruo Kawashima, Shunji Fukasawa | 2000-02-29 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6159064 | Swimming fin | Minoru Takeuchi, Yoshiharu Takizawa, Haruo Kawashima | 2000-12-12 |
| 6029284 | Swimming goggles | Haruo Kawashima, Shunji Fukasawa | 2000-02-29 |