Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6795466 | Distributed feedback type semiconductor laser device | Kiyoshi Takei, Yoshiaki Watanabe, Kiyofumi Chikuma | 2004-09-21 |
| 6714571 | Ridge type semiconductor laser of distributed feedback | Yoshiaki Watanabe, Kiyoshi Takei, Kiyofumi Chikuma | 2004-03-30 |
| 6573116 | Ridge type semiconductor laser of laterally-coupled distributed feedback and method of manufacturing the same | Yoshiaki Watanabe, Kiyoshi Takei, Kiyofumi Chikuma | 2003-06-03 |
| 6537841 | Ridge-structure DFB semiconductor laser and method of manufacturing the same | Kiyoshi Takei, Yoshiaki Watanabe, Kiyofumi Chikuma | 2003-03-25 |
| 6535670 | Optical transmitter/receiver module and method of manufacturing the same | Kiyoshi Takei, Yoshiaki Watanabe, Kiyofumi Chikuma | 2003-03-18 |
| 6504632 | Optical transmitter and receiver module which demultiplexes a superimposed optical signal | Yoshiaki Watanabe, Kiyoshi Takei, Kiyofumi Chikuma | 2003-01-07 |
| 6500687 | Distributed feedback semiconductor laser element and method for making the same | Kiyoshi Takei, Yoshiaki Watanabe, Kiyofumi Chikuma | 2002-12-31 |
| 6381258 | Ridge-structure DFB semiconductor laser and method of manufacturing the same | Kiyoshi Takei, Yoshiaki Watanabe, Kiyofumi Chikuma | 2002-04-30 |
| 6348360 | Method for producing semiconductor laser module | Kiyoshi Takei, Yoshiaki Watanabe, Kiyofumi Chikuma | 2002-02-19 |
| 6301283 | Distributed feedback semiconductor laser | Kiyoshi Takei, Yoshiaki Watanabe, Kiyofumi Chikuma | 2001-10-09 |
| 6291256 | Method of manufacturing non-regrowth distributed feedback ridge semiconductor | Yoshiaki Watanabe, Koyoshi Takei, Kiyofumi Chikuma | 2001-09-18 |
| 6292503 | Ridge type semiconductor laser of laterally-coupled distributed feedback and method of manufacturing the same | Yoshiaki Watanabe, Kiyoshi Takei, Kiyofumi Chikuma | 2001-09-18 |
| 5982804 | Non-regrowth distributed feedback ridge semiconductor laser and method of manufacturing the same | Yoshiaki Watanabe, Koyoshi Takei, Kiyofumi Chikuma | 1999-11-09 |