Issued Patents All Time
Showing 51–62 of 62 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5677971 | Optical wavelength filter with reduced sidelobes and simple design | Masao Kobayashi | 1997-10-14 |
| 5636045 | Photonic switching method and photonic switch utilizing same | Masato Kawahara, Saeko Oshiba, Yoshio Kawai | 1997-06-03 |
| 5388001 | Polarization-independent optical wavelength filter with simplified structure | Issei Asabayashi, Masao Kobayashi | 1995-02-07 |
| 5189714 | Optical wavelength filter device | Takashi Ushikubo | 1993-02-23 |
| 5163106 | Waveguide-type optical switch | Issei Asabayashi | 1992-11-10 |
| 5153934 | Waveguide-type optical device | Toshimasa Ishida | 1992-10-06 |
| 5133028 | Optical wave-length filter and a driving method thereof | Hiroki Yaegashi, Toshimasa Ishida | 1992-07-21 |
| 5123069 | Waveguide-type optical switch | Issei Asabayashi, Toshimasa Ishida | 1992-06-16 |
| 5086349 | Optical switching system which employs reference beams with different wavelengths | Toshimasa Ishida | 1992-02-04 |
| 5048906 | Waveguide type photoswitch with a short coupling region | Issei Asabayashi | 1991-09-17 |
| 4884858 | Distributed coupler switch | Takashi Ushikubo, Masato Kawahara, Issei Asabayashi | 1989-12-05 |
| 4846542 | Optical switch matrix | Akio Matoba, Nobuo Kobayashi, Issei Asabayashi, Kiyoshi Nagai, Ryoko Shibuya | 1989-07-11 |