Issued Patents All Time
Showing 26–37 of 37 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6271948 | Wavelength division multiplexed optical communication system | — | 2001-08-07 |
| 6236482 | WDM optical communication system | — | 2001-05-22 |
| 6175444 | Bi-directional optical amplifier | — | 2001-01-16 |
| 6111686 | Optical fiber amplifier | — | 2000-08-29 |
| 6104848 | WDM optical transmitter | Katsushi Akahori | 2000-08-15 |
| 6072601 | Optical fiber amplifier and an optical communication system using same | — | 2000-06-06 |
| 6064503 | Light source for wavelength division multiplexing communications | Katsushi Akahori | 2000-05-16 |
| 5953470 | Circuit for optical WDM system | — | 1999-09-14 |
| 5933270 | Optical equalizer | — | 1999-08-03 |
| 5923795 | Optical waveguide device having a double-refractor at an input thereof | — | 1999-07-13 |
| 5815609 | Waveguide type optical external modulator | — | 1998-09-29 |
| 5572610 | Waveguide-type optical device and impedance matching method thereof | — | 1996-11-05 |