Issued Patents All Time
Showing 1–25 of 62 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10228512 | Wavelength filter | — | 2019-03-12 |
| 10088628 | Optical waveguide element and receiving circuit | Yousuke Oonawa | 2018-10-02 |
| 9823418 | Waveguide-type optical diffraction grating and optical wavelength filter | — | 2017-11-21 |
| 9804328 | Optical multiplexing and de-multiplexing element and arrayed-waveguide grating-type optical wavelength filter | — | 2017-10-31 |
| 9780903 | Optical wavelength demultiplexer having optical interference filters connected in cascade | — | 2017-10-03 |
| 9274278 | Optical waveguide element | — | 2016-03-01 |
| 9151898 | Optical device | — | 2015-10-06 |
| 9151901 | Wavelength-selective path-switching element | — | 2015-10-06 |
| 8693820 | Flat optical waveguide with connections to channel and input optical waveguides | — | 2014-04-08 |
| 8682121 | Optical wavelength filter with wavelength characteristic variation minimized | — | 2014-03-25 |
| 8630517 | Optical multiplexer/demultiplexer | — | 2014-01-14 |
| 8532452 | Optical device and Mach-Zehnder interferometer | — | 2013-09-10 |
| 8401350 | Optical resonator, and fluid optical sensor employing an optical resonator | — | 2013-03-19 |
| 8218932 | Polarization independent optical device | — | 2012-07-10 |
| 8208772 | Polarization independent directional coupler and related optical devices | — | 2012-06-26 |
| 8150224 | Spot-size converter | — | 2012-04-03 |
| 8064490 | Optical resonator and tunable laser | — | 2011-11-22 |
| 7944831 | Data communication network having multidimensional link structure | Masato Kawahara | 2011-05-17 |
| 7839565 | Optical deflector | — | 2010-11-23 |
| 7835606 | Optical multiplexing/demultiplexing device | — | 2010-11-16 |
| 7684328 | Data transfer network | Masato Kawahara | 2010-03-23 |
| 7680361 | Optical buffer device | — | 2010-03-16 |
| 7664352 | Spot size converter | — | 2010-02-16 |
| 7511878 | Wavelength conversion element with quasi-phase matching structure | Yutaka Okabe | 2009-03-31 |
| 6879745 | Optical switch | — | 2005-04-12 |