Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7236703 | Optical wavelength division multiplexing device | Shigeo Yamanaka, Takashi Mizuochi, Katsuhiro Shimizu, Koji Goto, Shinichi Nakagawa +1 more | 2007-06-26 |
| 6870859 | Multiplexing system and multiplexing method of tributary signals | Seiji Kozaki, Kazuo Kubo, Hiroshi Ichibangase, Tadami Yasuda | 2005-03-22 |
| 6868514 | FEC frame structuring method and FEC multiplexer | Kazuo Kubo, Hideo Yoshida, Hiroshi Ichibangase, Hidenori Taga, Tadami Yasuda | 2005-03-15 |