Issued Patents All Time
Showing 26–42 of 42 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7623794 | Wavelength division-multiplex system | Makoto Takakuwa, Masahiro Yoshimoto, Takahiro Hosokawa | 2009-11-24 |
| 7583091 | Printed circuit board, and backplane data transmission method | — | 2009-09-01 |
| 7505685 | Wavelength-division multiplex communication system and apparatus | Takako Takanashi | 2009-03-17 |
| 7450856 | Dispersion compensating method and dispersion compensating apparatus | Masahiro Yoshimoto, Makoto Takakuwa, Takahiro Hosokawa | 2008-11-11 |
| 7376348 | Optical communication system | Koji Hasuo | 2008-05-20 |
| 7313327 | Switching control device for wavelength-division multiplexing optical signal | Takehiro Fujita | 2007-12-25 |
| 7242865 | Optical communication system | Koji Hasuo | 2007-07-10 |
| 7209661 | Wavelength multiplexing method and an apparatus thereof | Shota Mori | 2007-04-24 |
| 7139347 | Parallel signal automatic phase adjusting circuit | Takehiro Fujita | 2006-11-21 |
| 7139484 | Signal transmission method in WDM transmission system, and WDM terminal, optical add-drop multiplexer node, and network element used in the same system | Junya Kurumida | 2006-11-21 |
| 6934479 | Wavelength division multiplexing optical communication system and wavelength division multiplexing optical communication method | Takeshi Sakamoto, Toshikazu Ueki | 2005-08-23 |
| 6864968 | Method of measuring wavelength dispersion amount and optical transmission system | Shota Mori | 2005-03-08 |
| 6674567 | Raman excitation control method and optical transmission system using the same | Toshihiro Ohtani, Shota Mori, Tsukasa Takahashi, Hideki Kobayashi | 2004-01-06 |
| 6532102 | Optical amplifier | Hideki Kobayashi, Tsukasa Takahashi, Toshihiro Ohtani, Shota Mori | 2003-03-11 |
| 6466348 | Trunk apparatus of a wavelength-division-multiplexing communication system for controlling a gain of an optical amplifier provided therein | — | 2002-10-15 |
| 6449070 | Optical transmission device and wavelength-multiplexed optical transmission system | — | 2002-09-10 |
| 6275330 | Apparatus and method for controlling a wavelength-multiplex optical amplifier | — | 2001-08-14 |