Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7792430 | Automatic power restoring method and optical communication system | Hiroyuki Deguchi, Hideki Maeda, Akira Naka, Gentaro Funatsu | 2010-09-07 |
| 7664392 | Automatic power restoring method and optical communication system | Hiroyuki Deguchi, Hideki Maeda, Akira Naka, Gentaro Funatsu | 2010-02-16 |
| 7437069 | Automatic power restoring method and optical communication system | Hiroyuki Deguchi, Hideki Maeda, Akira Naka, Gentaro Funatsu | 2008-10-14 |
| 7420666 | Measurement method by OTDR and terminal station apparatus | Takayuki Maehara, Gentaro Funatsu, Hideki Maeda, Akira Naka | 2008-09-02 |
| 7215415 | Measurement method by OTDR and terminal station apparatus | Takayuki Maehara, Gentaro Funatsu, Hideki Maeda, Akira Naka | 2007-05-08 |
| 7092149 | Input monitoring system for optical amplifying repeater | Hiroyuki Deguchi, Masuo Suyama | 2006-08-15 |
| 6721507 | Optical communications system | Hiroyuki Iwata | 2004-04-13 |
| 6414770 | Optical communications system | Hiroyuki Iwata | 2002-07-02 |
| 6233076 | Optical communications system | Hiroyuki Iwata | 2001-05-15 |
| 6144474 | Optical transmission system including optical repeaters with selectively enabled gain equalizers contained therein and including an add/drop apparatus with a plurality of individually selectable filters | Mitsushi Nitta, Hiroshi Nakashima | 2000-11-07 |
| 5883735 | Optical amplifying repeater | Akira Sugiyama | 1999-03-16 |
| 5838476 | Input monitoring system for optical amplifying repeater | Hiroyuki Deguchi, Masuo Suyama | 1998-11-17 |
| 5784192 | Optical amplifying repeater | Akira Sugiyama | 1998-07-21 |
| 5615290 | Branch device for optical multiplex system | Haruo Fujiwara | 1997-03-25 |
| 5530936 | Semiconductor laser driving circuit | — | 1996-06-25 |
| 5459328 | Driver circuit for light emitting elements connected in series and an optical amplifying repeater using the same | Daisuke Kadota, Futoshi Ogawa | 1995-10-17 |