Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4956997 | Vessel speed detecting device | Kazuhiro Nakamura, Ryoji Sawada, Tomoji Nakamura | 1990-09-18 |
| 4943777 | Battery voltage warning device | Kazuhiro Nakamura, Ryoji Sawada, Tomoji Nakamura | 1990-07-24 |
| 4914945 | Vessel speed detecting device | Kazuhiro Nakamura, Ryoji Sawada, Tomoji Nakamura | 1990-04-10 |
| 4914946 | Vessel speed detecting device | Kazuhiro Nakamura, Ryoji Sawada, Tomoji Nakamura | 1990-04-10 |
| 4916644 | Running speed detecting device for marine vessels | Tomoji Nakamura, Ryoji Sawada, Kazuhiro Nakamura | 1990-04-10 |