Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10126556 | Light operation device | Atsushi Oguri, Masaki IWAMA | 2018-11-13 |
| 9071035 | Optical amplifier and method of controlling optical amplifier | Eisuke Otani, Toru Yoshikawa | 2015-06-30 |
| 7852550 | Optical amplifying apparatus | Takeo Okaniwa, Jie Wu, Toru Yoshikawa | 2010-12-14 |
| 7511883 | Optical amplifying method, optical amplifying apparatus, and optical amplified transmission system using the apparatus | Ryo Kawahara, Masaru Fukushima, Kensaku Sekiya | 2009-03-31 |
| 7333262 | Optical amplifying method, optical amplifying apparatus, and optical amplified transmission system using the apparatus | Ryo Kawahara, Masaru Fukushima, Kensaku Sekiya | 2008-02-19 |
| 6636659 | Optical amplification apparatus and optical transmission system | Koji Yamanaka | 2003-10-21 |
| 6538803 | Optical amplifier and optical wavelength division multiplexing communication system | — | 2003-03-25 |
| 5262365 | Quartz glass doped with rare earth element and production thereof | Akira Oyobe, Kazunori Nakamura, Yasumasa Sasaki | 1993-11-16 |