Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7698290 | Error correction method and apparatus | Koichi Saito, Youichi Fukada, Yoichi Maeda | 2010-04-13 |
| 5896216 | AM/PM converter and optical signal transmission system | Koji Kikushima, Nori Shibata, Kouichi Suto, Katsushi Iwashita, Satoshi Ikeda +3 more | 1999-04-20 |
| 5812667 | Subscriber registration and authentication method | Noriki Miki | 1998-09-22 |
| 5668652 | Optical WDM (wavelength division multiplexing) transmission system and method for configuring the same | Masashi Hashomoto, Norio Tamaki, Ryu Watanabe | 1997-09-16 |
| 5646758 | Optical time compression multiplexing transmission system | Noriki Miki | 1997-07-08 |
| 5608565 | Bidirectional optical transmission system | Yasuhiro Suzuki, Ryuichi Watanabe | 1997-03-04 |
| 5539564 | Point-to-multipoint optical transmission system | Seiichi Yamano, Noriki Miki, Ryuichi Watanabe, Shinichi Aoyagi, Yasuyuki Okumura +1 more | 1996-07-23 |
| 5204903 | Secure communication equipment and secure transmission system | Kenji Okada, Fumio Mano, Nobuyuki Tokura, Noriki Miki | 1993-04-20 |
| 4984262 | Digital service unit | Seiichi Yamano, Ryoichi Komiya | 1991-01-08 |