Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5898646 | Watch with extended dial | Yasuo Kitajima, Takayuki Hasumi | 1999-04-27 |
| 5833620 | Constant-rate deflator for sphygmomanometer | Tomomi Murakami, Hidetaka Tsuchiya, Takanori Nakahara | 1998-11-10 |
| 5592443 | Structure of a watch and assembling method thereof | Yasuo Kitajima, Takayuki Hasumi | 1997-01-07 |