Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6490078 | Optical fiber for optical amplifier, optical fiber amplifier and optical fiber laser | Masahiro Takagi, Yuichi Ohga, Motoki Kakui, Shinji Ishikawa, Masakazu Shigehara +1 more | 2002-12-03 |
| 6487340 | Optical fiber grating element, production method, and optical fiber filter | Shinji Ishikawa, Masakazu Shigehara, Michiko Takushima | 2002-11-26 |