Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11656582 | Radio wave watch | Yoshiyasu Watanabe, Ken Kitamura, Akira Kato | 2023-05-23 |
| 11150612 | Portable radio-controlled watch | Ken Kitamura, Akira Kato, Yohsuke NOMA | 2021-10-19 |
| 8451421 | Liquid crystal optical element and optical pickup apparatus | Shinya Sato | 2013-05-28 |
| 8098352 | Optical pickup apparatus and liquid crystal optical element | Naoki Fujii, Yoshiharu Takane | 2012-01-17 |