Issued Patents All Time
Showing 51–55 of 55 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4507184 | Method for finishing matted surface on a metal-made article for personal ornament | Hachiro Kushida, Kenji Irie | 1985-03-26 |
| 4479724 | Water-resisting structure for a watch | Masataka Matsumoto | 1984-10-30 |
| 4420264 | Structure for preventing the rotating of a register ring of a diver's watch | — | 1983-12-13 |
| 4397568 | Timepiece push-button structure | Masahiko Waki, Hisao Yamagata, Fumio Takeuchi, Masataka Matsumoto | 1983-08-09 |
| 4374624 | Sound emitting device for electronic timepiece | — | 1983-02-22 |