Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5996375 | Method of making an optical waveguide grating with two dissimilar irradiating steps | Michihiro Nakai, Kensuke Shima, Hiroshi Hidaka, Satoshi Okude, Tetsuya Sakai +2 more | 1999-12-07 |
| 5949934 | Optical waveguide grating and production method therefor | Kensuke Shima, Michihiro Nakai, Hiroshi Hidaka, Kuniharu Himeno, Satoshi Okude +4 more | 1999-09-07 |
| 5930437 | Optical filter with planar optical waveguide having periodically varied distribution of refractive index and production process thereof | Michihiro Nakai, Kensuke Shima, Hiroshi Hidaka, Satoshi Okude, Tetsuya Sakai +2 more | 1999-07-27 |