Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8811819 | Optical multiplexing terminal device, wavelength multiplexing passive optical network system and downlink wavelength transmission method | Tohru Kazawa, Masaki Ohira | 2014-08-19 |
| 8786804 | Surface light source device and LCD unit | Atsushi Omori, Tsuneo Sekiguchi, Yoji Oki | 2014-07-22 |
| 8724995 | Passive optical network system and operating method thereof | Tohru Kazawa, Akihiko Tsuchiya, Yusuke Yajima, Masatoshi Takihiro | 2014-05-13 |
| 8675870 | Encryption apparatus | Masaki Ohira | 2014-03-18 |
| 8532491 | Optical multiplexing terminating device, passive optical network system and method for allocating wavelength | Tohru Kazawa, Yusuke Yajima, Akihiko Tsuchiya | 2013-09-10 |
| 8477800 | Passive optical network system and operation method thereof | Tohru Kazawa, Masaki Ohira | 2013-07-02 |
| 8374503 | Passive optical network system and optical line terminal | Yusuke Yajima, Tohru Kazawa | 2013-02-12 |
| 8005362 | Passive optical network system and optical line terminal | Yusuke Yajima, Tohru Kazawa | 2011-08-23 |
| 7725031 | Passive optical network system and ranging system thereof | Tohru Kazawa, Masaki Ohira, Yusuke Yajima | 2010-05-25 |
| 7711268 | Passive optical network system and ranging system thereof | Tohru Kazawa, Masaki Ohira, Yusuke Yajima | 2010-05-04 |
| 7620325 | Transmission apparatus with function of multi-step bandwidth assignment to other communication apparatuses | Masahiko Mizutani, Yoshihiro Ashi, Masayuki Takase, Kenichi Sakamoto, Atsushi Iwamura +1 more | 2009-11-17 |
| 7512341 | Passive optical network system and ranging system thereof | Tohru Kazawa, Masaki Ohira, Yusuke Yajima | 2009-03-31 |
| 7489869 | Passive optical network system and ranging system thereof | Tohru Kazawa, Masaki Ohira, Yusuke Yajima | 2009-02-10 |
| 6140631 | Photosensor for use in electrophotography | Hiroaki Hamanaka, Fumiyuki Suda | 2000-10-31 |