Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6832020 | Variable wavelength dispersion compensator | Shinichi Wakana | 2004-12-14 |
| 6760686 | Device and method of calculating a residual value of an apparatus based on a history of use of the apparatus as well as an electrical apparatus including the device | — | 2004-07-06 |