Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6181648 | Electronic watch equipped with solar cell | Masao Mafune | 2001-01-30 |
| 4236238 | Electronic digital timepiece having a stopwatch function and a timer function | Katsuhiko Komiyama | 1980-11-25 |