Issued Patents 2017
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9837798 | Spark plug | Yuichi Yamada | 2017-12-05 |
| 9758422 | Optical fiber base material manufacturing apparatus | Masami Terashima, Takaaki Nagao | 2017-09-12 |
| 9731993 | Method for producing porous glass base material | Makoto Yoshida, Yuhei URATA | 2017-08-15 |