Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7511883 | Optical amplifying method, optical amplifying apparatus, and optical amplified transmission system using the apparatus | Ryo Kawahara, Masaru Fukushima, Nobuyuki Kagi | 2009-03-31 |
| 7333262 | Optical amplifying method, optical amplifying apparatus, and optical amplified transmission system using the apparatus | Ryo Kawahara, Masaru Fukushima, Nobuyuki Kagi | 2008-02-19 |