Issued Patents All Time
Showing 151–157 of 157 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4932249 | Speedometer for marine vessels | Ryoji Sawada, Tomoji Nakamura | 1990-06-12 |
| 4914946 | Vessel speed detecting device | Tatsuya Yoshioka, Ryoji Sawada, Tomoji Nakamura | 1990-04-10 |
| 4916644 | Running speed detecting device for marine vessels | Tomoji Nakamura, Ryoji Sawada, Tatsuya Yoshioka | 1990-04-10 |
| 4914945 | Vessel speed detecting device | Tatsuya Yoshioka, Ryoji Sawada, Tomoji Nakamura | 1990-04-10 |
| 4901696 | Ignition timing control system for internal combustion | Osamu Sakamoto | 1990-02-20 |
| 4821567 | Running speed detecting device for marine vessels | Tomoji Nakamura, Ryoji Sawada | 1989-04-18 |
| 4558443 | Moving coil type pickup cartridge | Etsuo Koyama | 1985-12-10 |