Issued Patents All Time
Showing 1–25 of 42 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10268101 | Optical logic circuit | — | 2019-04-23 |
| 9866344 | Frequency conversion device, wavelength multiplex device and frequency conversion method | — | 2018-01-09 |
| 9831944 | Probe generator, optical transmission apparatus and probe generating method | — | 2017-11-28 |
| 9735916 | Optical receiver, optical signal processing method, and optical transmission system | — | 2017-08-15 |
| 9490896 | Optical transceiver, optical transmission system, and light source output monitoring method | — | 2016-11-08 |
| 9354483 | Optical limiter, optical logic circuit, comparator, digital converter, optical transmission apparatus and optical processing method | — | 2016-05-31 |
| 9306362 | Optical branching device, optical amplification apparatus, and optical amplification method | — | 2016-04-05 |
| 8958702 | System and method for reducing interference of a polarization multiplexed signal | — | 2015-02-17 |
| 8818189 | Transmission-path-type specifying apparatus and transmission-path-type specifying method | — | 2014-08-26 |
| 8682157 | Optical communication system, optical receiving terminal, and optical signal fault detection method | — | 2014-03-25 |
| 8538268 | Optical signal demultiplexing device and optical signal demultiplexing method | — | 2013-09-17 |
| 8515288 | Optical signal transmission control apparatus and optical signal transmission control method | — | 2013-08-20 |
| 8401386 | Optical transmission apparatus | — | 2013-03-19 |
| 8279518 | Optical amplifier | — | 2012-10-02 |
| 8265063 | Transmission system | — | 2012-09-11 |
| 8031395 | Optical transmission system using Raman amplifier and controlling method thereof | — | 2011-10-04 |
| 7974799 | Backboard transmission method, backboard transmission apparatus, and substrate unit | — | 2011-07-05 |
| 7920568 | Frame transmission apparatus | — | 2011-04-05 |
| 7853151 | Optical communication system, method, and optical transmitting station | — | 2010-12-14 |
| 7853146 | Optical transmission apparatus | Makoto Takakuwa, Masahiro Yoshimoto, Takahiro Hosokawa | 2010-12-14 |
| 7812618 | Printed circuit board, and backplane data transmission method | — | 2010-10-12 |
| 7725040 | Wavelength division multiplexing transmission device | — | 2010-05-25 |
| 7627207 | Dispersion compensating method and dispersion compensating apparatus | Masahiro Yoshimoto, Makoto Takakuwa | 2009-12-01 |
| 7623791 | Optical signal multiplexing device and optical signal multiplexing method | — | 2009-11-24 |
| 7623787 | Wavelength division multiplexing transmission apparatus using a multiple wavelength light source | — | 2009-11-24 |