Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8494319 | Arrayed waveguide grating (AWG) with different radii in the input and output slab regions | — | 2013-07-23 |
| 8406580 | Planar lightwave fourier-transform spectrometer measurement including phase shifting for error correction | Kazumasa Takada | 2013-03-26 |
| 8098379 | Planar lightwave fourier-transform spectrometer | — | 2012-01-17 |
| 7155086 | Optical signal processing device using optical gate | Takashi Saida, Koichi Takiguchi | 2006-12-26 |
| 7020398 | Dispersion slope equalizer | Koichi Takiguchi, Takashi Goh | 2006-03-28 |
| 6954562 | Matrix switch of optical waveguide type and method for manufacturing the same | Tatsuo Izawa, Katsuhiko Kurumada, Toshiaki Tamamura, Makoto Sato | 2005-10-11 |
| 6912362 | Dispersion slope equalizer | Koichi Takiguchi, Takashi Goh | 2005-06-28 |
| 6898345 | Optical multiplexer and method for its production | Akimasa Kaneko | 2005-05-24 |
| 6788865 | Polarization maintaining optical fiber with improved polarization maintaining property | Satoki Kawanishi | 2004-09-07 |
| 6724957 | Optical filter | Takashi Saida, Takayuki Mizuno, Akira Himeno, Koichi Takiguchi, Manabu Oguma | 2004-04-20 |
| 6711313 | CDMA encoder-decoder, CDMA communication system, WDM-CDMA communication system | Koichi Takiguchi, Tomohiro Shibata, Masao Kato, Takashi Goh | 2004-03-23 |
| 6456760 | Optical signal processing apparatus and optical signal processing method | Takashi Kurokawa, Hiroyuki Tsuda, Kazunori Naganuma, Tetsuyoshi Ishii, Hirokazu Takenouchi | 2002-09-24 |
| 6404966 | Optical fiber | Satoki Kawanishi | 2002-06-11 |
| 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 |
| 6278813 | Wavelength division multi/demultiplexer | Kazumasa Takada, Hiroaki Yamada | 2001-08-21 |
| 6122419 | Optical signal processing apparatus and optical signal processing method | Takashi Kurokawa, Hiroyuki Tsuda, Kazunori Naganuma, Tetsuyoshi Ishii, Hirokazu Takenouchi | 2000-09-19 |
| 5943452 | Arrayed-waveguide grating | Akira Himeno, Hiroshi Takahashi | 1999-08-24 |
| 5546483 | Integrated optical waveguide circuit and optical branch line test system using the same | Yasuyuki Inoue, Masao Kawachi, Norio Takato, Fumihiko Yamamoto, Hiroyuki Suda +2 more | 1996-08-13 |
| 4781424 | Single mode channel optical waveguide with a stress-induced birefringence control region | Masao Kawachi, Kaname Jinguji, Norio Takato, Mitsuho Yasu | 1988-11-01 |
| 4525027 | Single mode optical fibers | Takao Edahiro, Akio Kawana, Tetsuo Miya | 1985-06-25 |
| 4480897 | Single-polarization single-mode optical fiber | Toshihito Hosaka, Yutaka Sasaki, Juichi Noda, Takao Edahiro | 1984-11-06 |
| 4372647 | Single mode optical fibers | Takao Edahiro, Akio Kawana, Tetsuo Miya | 1983-02-08 |