Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4268913 | Electronic calculator watch | Tadahiko Nakagiri, Kunihiro Daigo, Toshiaki Oguchi, Minoru Natori, Toshikazu Hatuse +6 more | 1981-05-19 |
| 4240021 | Solar cell battery charging control system | Makoto Yoshida | 1980-12-16 |
| 4188775 | Frequency adjustment means for electric timepiece | — | 1980-02-19 |