Issued Patents 2022
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11491576 | Refill friction stir spot welding method, pressing tool set, and refill friction stir spot welding device | Shunsuke HARUNA, Shintaro FUKADA, Takashi Ninomiya, Etsuko Yamada | 2022-11-08 |
| 11493721 | Optical fiber having identification mark and manufacturing method for optical fiber having identification mark | Hideki Yamaguchi | 2022-11-08 |
| 11396060 | Holding jig and holding jig set for double-acting friction stir spot welding, double-acting friction stir spot welding device, and double-acting friction stir spot welding method | Etsuko Yamada | 2022-07-26 |
| 11345627 | Method of manufacturing optical fiber preform and optical fiber preform | Tetsuya Haruna, Yoshiaki Tamura, Yuki Kawaguchi | 2022-05-31 |