Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6873637 | Semiconductor laser element including optical waveguide layers which have gradually varying bandgaps so as to reduce electrical resistance at interfaces | Toshiaki Fukunaga | 2005-03-29 |
| 6553046 | High-power semiconductor laser device including resistance reduction layer which has intermediate energy gap | Toshiaki Fukunaga, Mitsugu Wada | 2003-04-22 |