Issued Patents All Time
Showing 1–2 of 2 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 |
| 4257115 | Switch structure for electronic timepiece | Toshikazu Hatuse, Minoru Natori, Toshikazu Shimazaki, Hiroshi Ogawa | 1981-03-17 |