Issued Patents All Time
Showing 1–25 of 42 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12353130 | Photosensitive resin composition and photosensitive resin multilayer body | Tonami Tajiri, Teruhisa Yamada, Shinichi KUNIMATSU | 2025-07-08 |
| 7526199 | Optical transmission equipment preventing malfunction in recovery from fault | Kenro Sekine, Tadashi Matsuoka | 2009-04-28 |
| 6867909 | Filter with variable transmission character, optical transmission equipment and method of optical transmission | Daisuke Yoshida | 2005-03-15 |
| 6859308 | Optical amplifier | — | 2005-02-22 |
| 6839161 | Optical amplification apparatus | — | 2005-01-04 |
| 6839164 | Optical transmission equipment and supervisory system thereof | Tadashi Matsuoka | 2005-01-04 |
| 6836587 | Optical transmission device and optical transmission system employing the same | Takayuki Suzuki, Hiroyuki Nakano | 2004-12-28 |
| 6829408 | Optical amplifier, optical transmission equipment, optical transmission system, and method thereof | Hiroyuki Nakano, Takayuki Suzuki | 2004-12-07 |
| 6771854 | Optical transmission system and optical coupler/branching filter | Tadashi Matsuoka, Tetsushi Nakano | 2004-08-03 |
| 6674938 | Optical amplifier, optical transmission equipment, optical transmission system, and method thereof | Hiroyuki Nakano, Takayuki Suzuki | 2004-01-06 |
| 6671084 | Optical amplifier | — | 2003-12-30 |
| 6671431 | Optical transmission device and optical transmission system employing the same | Takayuki Suzuki, Hiroyuki Nakano | 2003-12-30 |
| 6580550 | Filter with variable transmission character, optical transmission equipment and method of optical transmission | Daisuke Yoshida | 2003-06-17 |
| 6577438 | Method and apparatus for monitoring and controlling gain tilt in an optical amplifier | Toshiki Sugawara | 2003-06-10 |
| 6563978 | Optical transmission system and optical coupler/branching filter | Tadashi Matsuoka, Tetsushi Nakano | 2003-05-13 |
| 6532103 | Optical fiber amplifier and optical transmission system using the same | Shinji Sakano, Ichiro Yokota, Takayuki Suzuki | 2003-03-11 |
| 6525871 | Optical amplification apparatus | — | 2003-02-25 |
| 6496617 | Optical amplifier, optical transmission equipment, optical transmission system, and method thereof | Hiroyuki Nakano, Takayuki Suzuki | 2002-12-17 |
| 6490387 | Optical transmission device and optical transmission system employing the same | Takayuki Suzuki, Hiroyuki Nakano | 2002-12-03 |
| 6483630 | OPTICAL AMPLIFIER, METHOD OF CONTROLLING THE OUTPUT LIGHT FROM THE OPTICAL AMPLIFIER, OPTICAL TRANSMISSION SYSTEM AND METHOD OF CONTROLLING AN OPTICAL TRANSMISSION PATH CROSS REFERENCE TO RELATED APPLICATION | — | 2002-11-19 |
| 6459527 | Optical amplifier apparatus and control method thereof, and optical transmission system using optical amplifier apparatus | — | 2002-10-01 |
| 6433925 | Optical fiber amplifier and optical transmission system using the same | Shinji Sakano, Ichiro Yokota, Takayuki Suzuki | 2002-08-13 |
| 6400475 | Optical transmission system and optical communications device | Takayuki Suzuki | 2002-06-04 |
| 6373622 | Optical amplification apparatus | — | 2002-04-16 |
| 6321002 | Optical amplifier, optical transmission equipment, optical transmission system, and method thereof | Hiroyuki Nakano, Takayuki Suzuki | 2001-11-20 |