Issued Patents 2021
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11075315 | Optical semiconductor element and method of manufacturing optical semiconductor element | Masahiro HITAKA, Akio Ito, Tatsuo DOUGAKIUCHI, Kazuue Fujita | 2021-07-27 |
| 11067728 | Movable diffraction grating, external-resonator laser module, and manufacturing method for movable diffraction grating | Atsushi Sugiyama, Tatsuo DOUGAKIUCHI | 2021-07-20 |