Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8290369 | Optical access system | Kenichi Sakamoto, Yoshihiro Ashi, Tohru Kazawa, Masayuki Takase, Masahiko Mizutani | 2012-10-16 |
| 8260135 | Passive optical network system and wavelength assignment method | Tohru Kazawa, Kenichi Sakamoto | 2012-09-04 |
| 8184977 | Optical line terminal capable of active bandwidth allocation for passive optical network system | Tohru Kazawa, Kenichi Sakamoto | 2012-05-22 |
| 8184975 | Passive optical network system and optical line terminator | Masao Niibe, Tohru Kazawa, Takeshi Kiyose | 2012-05-22 |
| 7889990 | Optical line terminal capable of active bandwidth allocation for passive optical network system | Tohru Kazawa, Kenichi Sakamoto | 2011-02-15 |
| 7873277 | Passive optical network system and wavelength assignment method | Tohru Kazawa, Kenichi Sakamoto | 2011-01-18 |
| 7840137 | Optical line terminal and optical network unit capable of alarm transmission scheme for passive optical network system | Tohru Kazawa, Kenichi Sakamoto | 2010-11-23 |
| 7773880 | Optical access system | Kenichi Sakamoto, Yoshihiro Ashi, Tohru Kazawa, Masayuki Takase, Masahiko Mizutani | 2010-08-10 |
| 7369768 | Optical access system | Kenichi Sakamoto, Yoshihiro Ashi, Tohru Kazawa, Masayuki Takase, Masahiko Mizutani | 2008-05-06 |