Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6666944 | Method of manufacturing optical filter | — | 2003-12-23 |
| 6570699 | Variable optical attenuator which applies a magnetic field to a Faraday element to rotate the polarization of a light signal | Hiroshi Onaka | 2003-05-27 |
| 6507422 | Optical attenuator and system, optical amplifier, and terminal device each having the optical attenuator | — | 2003-01-14 |