Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7970008 | Multiplexing transmission system and multiplexing transmission method | Yoshiaki Kisaka, Shigeki Aisawa, Tetsuo Takahashi, Takuya Ohara, Masahito Tomizawa +1 more | 2011-06-28 |
| 6626590 | Optical communication network | Naohide Nagatsu | 2003-09-30 |
| 6545780 | Wavelength allocation method, a transmission equipment and receiving equipment using this method and a wavelength division multiplex transmission system | Noboru Takachio, Shoko Ohteru | 2003-04-08 |
| 5917649 | Device and a method for evaluating an optical amplifier | Tohru Mori | 1999-06-29 |
| 5754320 | Optical cross-connect system | Atsushi Watanabe, Ken Sato | 1998-05-19 |
| 5617234 | Multiwavelength simultaneous monitoring circuit employing arrayed-waveguide grating | Mitsuhiro Teshima, Hitoshi Obara, Ken'ichi Sato | 1997-04-01 |
| 5204771 | Optical circulator | — | 1993-04-20 |
| 5099114 | Optical wavelength demultiplexer | Takao Matsumoto | 1992-03-24 |