Issued Patents 2017
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9760013 | Exposure apparatus, mask, and optical film | Tatsuya Sato, Kazuhiro Ura, Kenichi Watabe, Yuichi Kakubari | 2017-09-12 |
| 9594276 | Optical diffraction element, optical pickup, and optical diffraction element manufacturing method | Kenichi Watabe | 2017-03-14 |