Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12326642 | Wavelength filter and laser apparatus | Yukie Iga, Kazumasa Takabayashi, Suguru Akiyama | 2025-06-10 |
| 10890822 | Mach-zehnder optical modulator | Shigeki Kawaai, Manabu Yamazaki | 2021-01-12 |
| 7357521 | Chromatic dispersion compensation device and method | Yuichi Kawahata, Yasuhiro Hirose | 2008-04-15 |
| 7304798 | Spectroscopic apparatus | Hiroshi Nagaeda, Nobuaki Mitamura | 2007-12-04 |
| 7171084 | Optical apparatus provided with demultiplexing function | Nobuhiro Fukushima | 2007-01-30 |
| 7016096 | Transmission wavelength characteristics variable optical element, and wavelength characteristics variable apparatus, optical amplifier, and optical transmission system, using same | Takashi Ishiwada, Nobuaki Mitamura | 2006-03-21 |
| 6900940 | Optical apparatus and device | Nobuaki Mitamura, Yuichi Kawahata | 2005-05-31 |
| 6862126 | TRANSMISSION WAVELENGTH CHARACTERISTICS VARIABLE OPTICAL ELEMENT, AND WAVELENGTH CHARACTERISTICS VARIABLE APPARATUS, OPTICAL AMPLIFIER, OPTICAL TRANSMISSION SYSTEM, AND CONTROL METHOD OF TRANSMISSION WAVELENGTH CHARACTERISTICS, USING SAME | Takashi Ishiwada, Hiroshi Nagaeda, Nobuaki Mitamura | 2005-03-01 |
| 6836580 | Wavelength dispersion compensation system for compensating even for higher-order dispersion | Setsuo Yoshida | 2004-12-28 |