Issued Patents All Time
Showing 51–54 of 54 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7212335 | Apparatus and method for amplification medium performance simulation, and optical amplifier | Yasushi Sugaya, Etsuko Hayashi | 2007-05-01 |
| 7072100 | Optical amplifier and gain tilt compensation method | Yasushi Sugaya, Etsuko Hayashi | 2006-07-04 |
| 7061669 | Optical apparatus with loss compensation capability and optical amplifier for loss compensation | Hisao Nakashima, Miki Onaka, Etsuko Hayashi, Hideyuki Miyata | 2006-06-13 |
| 5604048 | Electrically conducting ceramic and fuel cell using the same | Masahide Akiyama, Shoji Yamashita | 1997-02-18 |