Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4729332 | Mooring apparatus | Harutaka Ohta, Kazuchiyo Miyamoto, Arataro Terayama, Seiji Maruhashi | 1988-03-08 |
| 4708082 | Mooring apparatus | Harutaka Ohta, Kazuchiyo Miyamoto, Arataro Terayama, Seiji Maruhashi | 1987-11-24 |
| 4643121 | Method of adding propulsive force to ice breaker | — | 1987-02-17 |