Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8412038 | Optical transmission device, optical transmission system including the same, and optical transmission method | — | 2013-04-02 |
| 7489876 | Optical transmission system having noise-elimination function | Takehiro Fujita, Motoyoshi Sekiya | 2009-02-10 |
| 7391560 | Multistage optical amplifier having tilt compensation feature | Motoyoshi Sekiya, Takehiro Fujita | 2008-06-24 |