Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6924429 | Electronic device and production method therefor | Takao Kasai, Makoto Wakasugi | 2005-08-02 |
| 4659897 | Method of making a watchcase | — | 1987-04-21 |
| 4496248 | Structure for a watch case made of cemented carbide | Masahiko Waki, Seiji Umezawa, Hiroshi Koide, Takao Kasai | 1985-01-29 |
| 4444719 | Gold solders | Yosuke Sakakibara, Takao Kasai | 1984-04-24 |
| 4419409 | Bicolored polyhedral body of aluminum | Machiro Kushida, Kenji Irie | 1983-12-06 |
| 4408900 | Joint structure of bezel and watch body | Seiji Umezawa | 1983-10-11 |
| 4382172 | Method for fabricating a watch case | Seiji Umezawa | 1983-05-03 |
| 4375391 | Method for manufacturing bicolored polyhedral body of aluminum | Hachiro Kushida, Kenji Irie | 1983-03-01 |