Issued Patents All Time
Showing 26–50 of 64 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7961991 | Delay demodulation devices | Junichi Hasegawa | 2011-06-14 |
| 7885493 | Broadband wavelength multiplexing and demultiplexing filter and optical splitter with optical signal multiplexing and demultiplexing function | Haruki Urabe, Tsunetoshi Saitoh, Masahito Morimoto | 2011-02-08 |
| 7884996 | Delay-line demodulator | Junichi Hasegawa | 2011-02-08 |
| 7813032 | Methods to control phase shifts of delay demodulation devices | Junichi Hasegawa | 2010-10-12 |
| 7649678 | Delay-line demodulator | Junichi Hasegawa | 2010-01-19 |
| 7561765 | Optical integrated circuit and optical integrated circuit module | Masaki Funabashi, Junichi Hasegawa, Takeshi Akutsu, Noriyuki Yokouchi | 2009-07-14 |
| 7555175 | Arrayed waveguide grating optical multiplexer/demultiplexer | — | 2009-06-30 |
| 7542640 | Arrayed waveguide grating optical multiplexer/demultiplexer | — | 2009-06-02 |
| 7539368 | Arrayed waveguide grating | Junichi Hasegawa | 2009-05-26 |
| 7492983 | Optical circuit device | Noritaka Matsubara, Hiroshi Kawashima | 2009-02-17 |
| 7480091 | Delay-line demodulator and method of adjusting a phase shift in the demodulator | Junichi Hasegawa | 2009-01-20 |
| 7469079 | Broadband wavelength multiplexing and demultiplexing filter and optical splitter with optical signal multiplexing and demultiplexing function | Haruki Urabe, Tsunetoshi Saitoh, Masahito Morimoto | 2008-12-23 |
| 7233714 | Planar optical waveguide circuit type variable attenuator | Hiroshi Kawashima | 2007-06-19 |
| 7146079 | Dynamic gain equalizer | Kazuhisa Kashihara, Noritaka Matsubara | 2006-12-05 |
| 7133587 | Dispersion compensator, method for manufacturing the same, and method for compensating wavelength dispersion | Kazuhisa Kashihara | 2006-11-07 |
| 7072545 | Dispersion compensator, method for manufacturing the same, and method for compensating wavelength dispersion | Kazuhisa Kashihara | 2006-07-04 |
| 6920265 | Arrayed waveguide grating type optical multiplexer/demultiplexer | Kazuhisa Kashihara | 2005-07-19 |
| 6870979 | Optical circuit, method for manufacturing optical circuit, optical circuit device and method for controlling optical circuit device | Hiroshi Kawashima | 2005-03-22 |
| 6836591 | Arrayed waveguide grating type optical multiplexer/demultiplexer and optical waveguide circuit | Kazuhisa Kashihara | 2004-12-28 |
| 6829418 | Optical waveguide circuit device | Kazuhisa Kashihara, Yoshinobu Nekado, Tunetoshi Saito | 2004-12-07 |
| 6816651 | Arrayed waveguide grating optical multiplexer/demultiplexer and method for manufacturing the same | Kazuhisa Kashihara | 2004-11-09 |
| 6768840 | Arrayed waveguide grating and method for manufacturing the same | Kazhuhisa Kashihara | 2004-07-27 |
| 6768832 | Arrayed waveguide grating optical multiplexer/demultiplexer and method for manufacturing the same | Takeshi Nakajima, Kazuhisa Kashihara | 2004-07-27 |
| 6763164 | Method for manufacturing a planar lightwave circuit, and planar waveguide circuit | Kazuhisa Kashihara, Yoshinobu Nekado | 2004-07-13 |
| 6735364 | Arrayed waveguide grating optical multiplexer/demultiplexer and method for manufacturing the same | Kazuhisa Kashihara, Kanji Tanaka | 2004-05-11 |