Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6580854 | Optical waveguide grating and method of making the same | Shinji Ishikawa, Masakazu Shigehara, Michiko Harumoto | 2003-06-17 |
| 6563984 | Long-period grating device | Michiko Harumoto, Masakazu Shigehara, Shinji Ishikawa | 2003-05-13 |