Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6229631 | Signal transmission system and method for supervising the same | Hideaki Sato, Issei Asabayashi, Takashi Watanabe | 2001-05-08 |
| 5790301 | Optical filter module and optical amplification using it | Takashi Watanabe, Toshio Nakamura, Manabu Wakabayashi | 1998-08-04 |
| 5119391 | Automatic frequency control circuit for coherent diversity reception | Hiroyuki Yamazaki | 1992-06-02 |