Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8404133 | Manufacturing method of planar optical waveguide device with grating structure | Ken Sakuma, Kensuke Ogawa, Kazuhiro Goi, Ning Guan, Mingbin Yu +2 more | 2013-03-26 |
| 8227178 | Manufacturing method of planar optical waveguide device with grating structure | Ken Sakuma, Kensuke Ogawa, Kazuhiro Goi, Ning Guan, Mingbin Yu +2 more | 2012-07-24 |
| 7065280 | Dispersion compensation device | Kensuke Ogawa | 2006-06-20 |