Issued Patents All Time
Showing 1–25 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12276832 | Optical device, substrate optical waveguide element, and optical communication apparatus | Jianping Wang, Hoshihiko TODA | 2025-04-15 |
| 12184338 | Optical 90-degree hybrid | — | 2024-12-31 |
| 12021562 | Tap coupler, optical communication apparatus, and optical branching method | — | 2024-06-25 |
| 11927125 | Prediction device, prediction method, and work vehicle | Tatsuya Yamakawa, Yohei Nishikawa | 2024-03-12 |
| 11714234 | Optical waveguide device that converts polarization of light | — | 2023-08-01 |
| 11662522 | Optical waveguide device operated as mode converter | — | 2023-05-30 |
| 11543593 | Optical device, and light source module using the same | — | 2023-01-03 |
| 11460635 | Optical waveguide device | — | 2022-10-04 |
| 11307355 | 90-degree optical hybrid | — | 2022-04-19 |
| 11223425 | Optical circuit device, and optical receiver | — | 2022-01-11 |
| 10422953 | Optical module and inputting method | Takuya Oda | 2019-09-24 |
| 9874692 | Substrate-type optical waveguide element and method for producing substrate-type optical waveguide element | — | 2018-01-23 |
| 9851504 | Planar optical waveguide device, DP-QPSK modulator, coherent receiver, and polarization diversity | — | 2017-12-26 |
| 9851505 | Substrate-type optical waveguide element | — | 2017-12-26 |
| 9835798 | Planar optical waveguide device, polarization multiplexing 4-value phase modulator, coherent receiver, and polarization diversity | — | 2017-12-05 |
| 9810842 | Substrate-type optical waveguide element | — | 2017-11-07 |
| 9784918 | Substrate-type optical waveguide element | — | 2017-10-10 |
| 9557482 | High-order polarization conversion device, optical waveguide device, and DP-QPSK modulator | Kazuhiro Goi, Kensuke Ogawa, Hiroyuki Kusaka | 2017-01-31 |
| 9529151 | Polarization conversion element | Kazuhiro Goi, Hiroyuki Kusaka, Kensuke Ogawa | 2016-12-27 |
| 9500807 | Planar optical waveguide element, dual polarization quadrature phase shift keying modulator, coherent receiver, and polarization diversity | — | 2016-11-22 |
| 9335472 | Planar optical waveguide device and DP-QPSK modulator | Kensuke Ogawa, Kazuhiro Goi, Hiroyuki Kusaka | 2016-05-10 |
| 9304254 | Substrate-type waveguide element and optical modulator | — | 2016-04-05 |
| 9008476 | Polarization conversion device | Kazuhiro Goi, Kensuke Ogawa, Hiroyuki Kusaka | 2015-04-14 |
| 4510552 | Device for housing communication circuits and equipment | Takashi Kanno, Ituo Okamoto, Kouji Mizushima, Shinji Oguro | 1985-04-09 |
| 4496057 | Rack structure for mounting a communication apparatus | Hideki Zenitani, Itsuo Okamoto, Hisao Hayashi, Masajiro Taniguchi | 1985-01-29 |