Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8537458 | Optical fiber for optical amplification, optical fiber amplifier, and optical fiber laser | Shigeto Matsumoto | 2013-09-17 |
| 8141391 | Glass preform manufacturing method | Kenichi Takahashi | 2012-03-27 |