Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7209284 | Optical amplifier using reflection-type variable optical attenuator for feedback | Norifumi Shukunami, Norihisa Naganuma, Yuichi Suzuki | 2007-04-24 |
| 7016096 | Transmission wavelength characteristics variable optical element, and wavelength characteristics variable apparatus, optical amplifier, and optical transmission system, using same | Hirotomo Izumi, Nobuaki Mitamura | 2006-03-21 |
| 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 | Hirotomo Izumi, Hiroshi Nagaeda, Nobuaki Mitamura | 2005-03-01 |