Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8554040 | Planar lightwave circuit, design method for wave propagation circuit, and computer program | Takashi Saida, Yohei Sakamaki, Toshikazu Hashimoto, Tsutomu Kitoh, Hiroshi Takahashi +4 more | 2013-10-08 |
| 8538222 | Planar lightwave circuit, design method for wave propagation circuit, and computer program | Takashi Saida, Yohei Sakamaki, Toshikazu Hashimoto, Tsutomu Kitoh, Hiroshi Takahashi +4 more | 2013-09-17 |
| 8463097 | Planar lightwave circuit, design method for wave propagation circuit, and computer program | Takashi Saida, Yohei Sakamaki, Toshikazu Hashimoto, Tsutomu Kitoh, Hiroshi Takahashi +4 more | 2013-06-11 |
| 7856163 | Planar lightwave circuit, design method for wave propagation circuit, and computer program | Takashi Saida, Yohei Sakamaki, Toshikazu Hashimoto, Tsutomu Kitoh, Hiroshi Takahashi +4 more | 2010-12-21 |
| 7580597 | Optical functional circuit | Tsutomu Kitoh, Yohei Sakamaki, Toshikazu Hashimoto, Takashi Saida, Hiroshi Takahashi +3 more | 2009-08-25 |
| 7397977 | Wave transmission medium and waveguide circuit | Toshikazu Hashimoto, Ikuo Ogawa, Takeshi Kitagawa, Masahiro Yanagisawa, Tomohiro Shibata +8 more | 2008-07-08 |
| 6975781 | Characteristic adjustment method of multistage Mach-Zehnder interferometer type optical circuit and multistage Mach-Zehnder interferometer type optical circuit | Koichi Takiguchi | 2005-12-13 |
| 6718140 | Optical wavelength division multiplexing transmission network device | Shin Kamei, Akimasa Kaneko, Kuniharu Kato | 2004-04-06 |
| 6643463 | Optical wavelength division multiplexing transmission network system using transmitting/receiving apparatuses having 2-input and 2-output optical path switching elements | Masao Kawachi, Kennosuke Fukami, Yuji Akatsu, Kazutosi Kato, Mitsuru Harada +2 more | 2003-11-04 |
| 6304687 | Optical waveguide circuit, its manufacturing method and optical waveguide module having the optical waveguide circuit | Yasuyuki Inoue, Akimasa Kaneko, Hiroshi Takahashi, Fumiaki Hanawa, Kuninori Hattori +9 more | 2001-10-16 |