Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8404133 | Manufacturing method of planar optical waveguide device with grating structure | Ken Sakuma, Kensuke Ogawa, Kazuhiro Goi, Yong Tsong Tan, Ning Guan +2 more | 2013-03-26 |
| 8227178 | Manufacturing method of planar optical waveguide device with grating structure | Ken Sakuma, Kensuke Ogawa, Kazuhiro Goi, Yong Tsong Tan, Ning Guan +2 more | 2012-07-24 |