Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6668057 | Apparatus for receiving tone signal, apparatus for transmitting tone signal, and apparatus for transmitting or receiving tone signal | Eiji Otsuka, Yoshiko Hase | 2003-12-23 |
| 6600797 | Phase frequency synchronism circuit and optical receiver | Atsushi Hasegawa, Tetsuya Aoki | 2003-07-29 |
| 6595708 | Optical receiver circuit and optical module using same in optical communication system | — | 2003-07-22 |