Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7899331 | WDM optical transmission system and optical amplifying apparatus | Hiroyuki Itoh | 2011-03-01 |
| 7880960 | Optical amplifier and abnormality detection method for the same | Yuji Tamura | 2011-02-01 |