Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6768760 | Ridge-waveguide semiconductor laser device | Yutaka Mihashi, Yoshihiko Hanamaki | 2004-07-27 |
| 6741630 | Ridge waveguide distributed feedback laser | — | 2004-05-25 |
| 6674784 | Distributed feedback laser device and method for manufacturing the same | Yoshihiko Hanamaki | 2004-01-06 |