Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9768907 | Optical transmission apparatus and wavelength calibration method | — | 2017-09-19 |
| 9549233 | Transmission device and optical network system | — | 2017-01-17 |
| 9503211 | Signal detection circuit and optical transmission equipment | Shoichiro Oda, Takeshi Hoshida | 2016-11-22 |
| 9281913 | Signal detection circuit and optical transmission equipment | Shoichiro Oda, Takeshi Hoshida | 2016-03-08 |
| 9154233 | Frequency modulation signal demodulator and light receiving apparatus | Takeshi Hoshida | 2015-10-06 |
| 9054814 | Front end device and superposing signal detecting device | Takeshi Hoshida | 2015-06-09 |
| 8965221 | Receiver and cross phase modulation reduction method | Takeshi Hoshida | 2015-02-24 |
| 8886057 | Optical receiver, signal processor, and optical receiving method | Takeshi Hoshida | 2014-11-11 |
| 8509628 | Differential multilevel modulated optical signal receiver apparatus | Takeshi Hoshida | 2013-08-13 |
| 7751721 | Optical DQPSK receiver apparatus | Takeshi Hoshida | 2010-07-06 |
| 7706695 | Optical DQPSK receiver apparatus | Takeshi Hoshida | 2010-04-27 |
| 7631378 | Optical waveform shaper | Takeshi Hoshida, Hiroshi Onaka | 2009-12-15 |
| 7613403 | Differential multilevel modulated optical signal receiver apparatus | Takeshi Hoshida | 2009-11-03 |
| 7535616 | Polarization controlling apparatus and polarization operation apparatus | Nobuhiro Fukushima, Jens Rasmussen | 2009-05-19 |
| 7212334 | Optical signal-to-noise ratio improving device | — | 2007-05-01 |
| 7123403 | Optical signal-to-noise ratio improving device | — | 2006-10-17 |
| 6778730 | Optical signal processing device | — | 2004-08-17 |
| 6477300 | Method, device, and system for waveform shaping of signal light | Shigeki Watanabe, Shinichi Takeda | 2002-11-05 |
| 6256137 | Wavelength converter | — | 2001-07-03 |
| 6072610 | Optical transmission system | Satoshi Kuroyanagi, Tetsuya Nishi, Takuji Maeda | 2000-06-06 |
| 5805320 | Cross-connect device | Satoshi Kuroyanagi, Takuji Maeda | 1998-09-08 |