Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6487340 | Optical fiber grating element, production method, and optical fiber filter | Tadashi Enomoto, Shinji Ishikawa, Masakazu Shigehara | 2002-11-26 |
| 6337937 | Optical filter and method of making the same | Masakazu Shigehara | 2002-01-08 |