Issued Patents All Time
Showing 26–36 of 36 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6618417 | Ridge waveguide semiconductor laser diode | Yoshikazu Ikegami, Takeshi Namegaya, Akihiko Kasukawa | 2003-09-09 |
| 6560260 | Ridge waveguide semiconductor laser diode | Yoshikazu Ikegami, Takeshi Namegaya, Akihiko Kasukawa | 2003-05-06 |
| 6549554 | Semiconductor laser element, semiconductor etchant, and method of fabricating the semiconductor laser element | Takeshi Shiojima, Keiichi Yabusaki | 2003-04-15 |
| 5962873 | Semiconductor laser device having a COD-preventing structure | Tetsuro Ijichi, Yoshikazu Ikegami | 1999-10-05 |
| 5929462 | Semiconductor optical device having a strained quantum well structure | Akihiko Kasukawa, Nobumitsu Yamanaka | 1999-07-27 |
| 5929461 | Optical semiconductor device having a semiconductor laminate mirror | Takeharu Yamaguchi, Takao Ninomiya | 1999-07-27 |
| 5832018 | Semiconductor laser device | — | 1998-11-03 |
| 5814843 | Heterojunction bipolar transistor having a graded-composition base region | — | 1998-09-29 |
| 5757833 | Semiconductor laser having a transparent light emitting section, and a process of producing the same | Satoshi Arakawa, Norihiro Iwai, Takuya Ishikawa, Akihiko Kasukawa, Takao Ninomiya | 1998-05-26 |
| 5710439 | Optoelectronic integrated device having optical elements and electronic elements grown in a monolithic form on a GaAs ssubstrate | — | 1998-01-20 |
| 5388116 | Semiconductor laser device | Toshio Kikuta | 1995-02-07 |