Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8005423 | Wireless communication system including a server device and multiple relay devices | Naoki Sumita, Masamichi Izumida | 2011-08-23 |
| 7225192 | Hybrid recording medium and information recording apparatus | Akihiro Tozaki, Masahiro Katsumura, Teruo Baba, Manahiko Hashiotani, Masami Suzuki +1 more | 2007-05-29 |
| 6795466 | Distributed feedback type semiconductor laser device | Nong Chen, Yoshiaki Watanabe, Kiyofumi Chikuma | 2004-09-21 |
| 6714571 | Ridge type semiconductor laser of distributed feedback | Yoshiaki Watanabe, Nong Chen, Kiyofumi Chikuma | 2004-03-30 |
| 6573116 | Ridge type semiconductor laser of laterally-coupled distributed feedback and method of manufacturing the same | Yoshiaki Watanabe, Nong Chen, Kiyofumi Chikuma | 2003-06-03 |
| 6537841 | Ridge-structure DFB semiconductor laser and method of manufacturing the same | Nong Chen, Yoshiaki Watanabe, Kiyofumi Chikuma | 2003-03-25 |
| 6535670 | Optical transmitter/receiver module and method of manufacturing the same | Yoshiaki Watanabe, Nong Chen, Kiyofumi Chikuma | 2003-03-18 |
| 6519379 | Optical integrated device and manufacturing method thereof | Masataka Izawa | 2003-02-11 |
| 6504632 | Optical transmitter and receiver module which demultiplexes a superimposed optical signal | Yoshiaki Watanabe, Nong Chen, Kiyofumi Chikuma | 2003-01-07 |
| 6500687 | Distributed feedback semiconductor laser element and method for making the same | Yoshiaki Watanabe, Nong Chen, Kiyofumi Chikuma | 2002-12-31 |
| 6381258 | Ridge-structure DFB semiconductor laser and method of manufacturing the same | Nong Chen, Yoshiaki Watanabe, Kiyofumi Chikuma | 2002-04-30 |
| 6348360 | Method for producing semiconductor laser module | Nong Chen, Yoshiaki Watanabe, Kiyofumi Chikuma | 2002-02-19 |
| 6301283 | Distributed feedback semiconductor laser | Nong Chen, Yoshiaki Watanabe, Kiyofumi Chikuma | 2001-10-09 |
| 6292503 | Ridge type semiconductor laser of laterally-coupled distributed feedback and method of manufacturing the same | Yoshiaki Watanabe, Nong Chen, Kiyofumi Chikuma | 2001-09-18 |
| 5182669 | High density optical disk and method of making | Kiyofumi Chikuma | 1993-01-26 |
| 4883095 | Connecting construction for sidestay of heald frame and transverse beam | Setsu Maruyama | 1989-11-28 |