Issued Patents 2003
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6625190 | Semiconductor laser device having thickened impurity-doped aluminum-free optical waveguide layers | Toshiro Hayakawa, Toshiaki Fukunaga | 2003-09-23 |
| 6600770 | High-power semiconductor laser device having current confinement structure and index-guided structure and stably oscillating in single mode | Toshiaki Fukunaga, Kenji Matsumoto | 2003-07-29 |
| 6553046 | High-power semiconductor laser device including resistance reduction layer which has intermediate energy gap | Fujio Akinaga, Toshiaki Fukunaga | 2003-04-22 |
| 6535536 | Semiconductor laser element | Toshiaki Fukunaga, Kenji Matsumoto | 2003-03-18 |
| 6516016 | High-power semiconductor laser device having current confinement structure and index-guided structure, and oscillating in transverse mode | Toshiaki Fukunaga | 2003-02-04 |