Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5481996 | Speed-increased small boat | Masakazu Osawa | 1996-01-09 |
| 5088433 | Wave-making resistance suppressing means in ship and ship provided therewith | Masakazu Osawa | 1992-02-18 |