Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7272314 | Optical crossconnect apparatus and optical transmission system | Yasuyuki Fukashiro, Yukio Hayashi, Shigeki Kitajima, Tatsuo Kanetake, Masahiro Takatori +1 more | 2007-09-18 |
| 7242860 | Optical protection switching using 2 by 2 switching functions | Hiroki Ikeda, Shigeki Kitajima | 2007-07-10 |
| 6813445 | Optical crossconnect apparatus and optical transmission system | Yasuyuki Fukashiro, Yukio Hayashi, Shigeki Kitajima, Tatsuo Kanetake, Masahiro Takatori +1 more | 2004-11-02 |
| 6362905 | Optical crossconnect apparatus and optical transmission system | Yasuyuki Fukashiro, Yukio Hayashi, Shigeki Kitajima, Tatsuo Kanetake, Masahiro Takatori +1 more | 2002-03-26 |
| 6317230 | Optical cross-connect system and optical transmission system | Shigeki Kitajima, Hirohisa Sano, Tatsuo Kanetake | 2001-11-13 |
| 5548399 | Method and apparatus for testing a DC coupled optical receiver | Atsushi Takai | 1996-08-20 |
| 5543629 | Superlattice avalanche photodiode (APD) | Hitoshi Nakamura, Shigehisa Tanaka, Tsukuru Ohtoshi, Koji Ishida, Yausunobu Matsuoka | 1996-08-06 |
| 5422968 | Optical demultiplexing system with optical amplifiers | Hideaki Tsushima, Hiroaki Inoue | 1995-06-06 |
| 5324959 | Semiconductor optical device having a heterointerface therein | Hitoshi Nakamura, Chiaki Notsu, Tsukuru Ohtoshi, Koji Ishida | 1994-06-28 |