Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6925220 | Optical switch using multimode interferometer, and optical demultiplexer | — | 2005-08-02 |
| 6856716 | Optical interferometer generating a mode-locked laser oscillation, all-optical switch, all-optical asymmetric demultiplexer and all optical pulse reshaping apparatus | — | 2005-02-15 |
| 6815242 | Semiconductor device and method of manufacturing the same | Hiroshi Ishikawa | 2004-11-09 |
| 6771847 | Optical switch using multimode interferometer, and optical demultiplexer | — | 2004-08-03 |
| 6760524 | Optical signal processing device, optical demultiplexer, wavelength converting device, optical signal processing method, and wavelength converting method | — | 2004-07-06 |
| 6507042 | Semiconductor device and method of manufacturing the same | Hiroshi Ishikawa | 2003-01-14 |
| 5817538 | Method of making quantum box semiconductor device | Nobuyuki Ohtsuka | 1998-10-06 |
| 5608229 | Quantum box semiconductor device | Nobuyuki Ohtsuka | 1997-03-04 |