Issued Patents 2023
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11820691 | Manufacturing apparatus and manufacturing method for optical fiber porous preform | Tatsuyuki Higashizawa, Masaki Nakajima | 2023-11-21 |
| 11565964 | Method of manufacturing porous glass preform for optical fiber | Masaki Nakajima | 2023-01-31 |