Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8249455 | Passive optical network system and ranging method | Tohru Kazawa, Yusuke Yajima | 2012-08-21 |
| 7957647 | Passive optical network system and ranging method | Tohru Kazawa, Yusuke Yajima | 2011-06-07 |