Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5930015 | Optical access system | Takaya Yamamoto, Katsuyuki Yamazaki, Shu Yamamoto | 1999-07-27 |
| 5886803 | Bilateral optical transmission system and optical transceiver for pulse information | Takaya Yamamoto, Katsuyuki Yamamoto, Shu Yamamoto | 1999-03-23 |
| 5247512 | Echo canceller | Fumiaki Sugaya | 1993-09-21 |