Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12306533 | Optical device manufacturing method and manufacturing apparatus using local etching | Yoshinori Hibino, Mikihiro Kurosawa, Masahiro Yanagisawa, Tomoyuki Yamada | 2025-05-20 |
| 12107626 | Wavelength monitoring device and controlling method thereof | Osamu Moriwaki, Takashi Saida, Kenya Suzuki, Takashi Go, Yuichiro Ikuma | 2024-10-01 |
| 11982837 | Interposer circuit | Yuichiro Ikuma, Yusuke Nasu, Takashi Yamada | 2024-05-14 |
| 11982839 | Optical 90 degree hybrid circuit | Makoto Jizodo, Yusuke Nasu, Yuichiro Ikuma | 2024-05-14 |
| 11973535 | Wavelength monitoring circuit | Osamu Moriwaki, Kenya Suzuki, Takashi Go, Yuichiro Ikuma | 2024-04-30 |
| 11835761 | Planar optical waveguide circuit | Osamu Moriwaki, Kenya Suzuki, Takashi Go, Yuichiro Ikuma | 2023-12-05 |
| 11656405 | Optical multi/demultiplexing circuit | Osamu Moriwaki, Kenya Suzuki | 2023-05-23 |
| 11493776 | Polarization multiplexed optical transmitter circuit and polarization multi/demultiplexed optical transceiver circuit | Yusuke Nasu, Shogo Yamanaka, Makoto Jizodo | 2022-11-08 |
| 9407371 | Optical multiplexer/demultiplexer | Ikuo Ogawa, Yoshiyuki Doi, Masayuki Itoh, Hiroshi Takahashi | 2016-08-02 |
| 9306670 | Optical coupling/splitting device, two-way optical propagation device, and optical-transmit-receive system | Masamichi Fujiwara, Kenichi Suzuki, Naoto Yoshimoto, Toshio Watanabe, Hiroshi Takahashi +2 more | 2016-04-05 |
| 8737779 | Optical wavelength multi/demultiplexer | Tsutomu Kitoh, Shin Kamei, Toshikazu Hashimoto, Yohei Sakamaki, Hiroshi Takahashi | 2014-05-27 |
| 8483525 | Optical wavelength multiplexing/demultiplexing circuit, optical module using optical wavelength multiplexing/demultiplexing circuit, and communication system | Tsutomu Kitoh, Shin Kamei, Toshikazu Hashimoto, Yohei Sakamaki, Hiroshi Takahashi | 2013-07-09 |
| 8346030 | Polarization-independent waveguide-type optical interference circuit | Yasuaki Hashizume, Takashi Saida, Masaki Kotoku, Takayuki Mizuno | 2013-01-01 |
| 8150219 | Waveguide-type optical interferometer | Yusuke Nasu, Yasuaki Hashizume, Yasuyuki Inoue, Hiroshi Takahashi, Kuninori Hattori +2 more | 2012-04-03 |
| 7590312 | Interferometer optical switch and variable optical attenuator | Takayuki Mizuno, Hiroshi Takahashi, Tsutomu Kitoh, Shunichi Souma | 2009-09-15 |
| 7085438 | Optical multi/demultiplexing circuit equipped with phase generating device | Takayuki Mizuno, Tsutomu Kitoh, Yasuyuki Inoue | 2006-08-01 |
| 6735358 | Optical multiplexer and optical demultiplexer | Tsutomu Kitoh, Yasuyuki Inoue, Yoshinori Hibino, Kaname Jinguji | 2004-05-11 |
| 6731828 | Waveguide-type optical signal processing circuit | Tsutomu Kitou, Yasuyuki Inoue, Takayuki Mizuno, Yoshinori Hibino, Masaki Koutoku | 2004-05-04 |
| 6724957 | Optical filter | Takashi Saida, Takayuki Mizuno, Akira Himeno, Katsunari Okamoto, Koichi Takiguchi | 2004-04-20 |
| 6606433 | Optical multi/demultiplexer | Akira Himeno, Kaname Jinguji, Tsutomu Kitoh, Yoshinori Hibino | 2003-08-12 |