Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7079483 | Ring network and method for path interchange therein | Hirotaka Yamada, Yuichi Namioka, Naomi Yokoyama, Yutaka Tokunou, Kousaku Awada | 2006-07-18 |
| 4930119 | Duplex system of transmission lines in a loop network | Kenzo Kobayashi, Mitsuyo Hasegawa, Kazushi Suganuma | 1990-05-29 |