Issued Patents 2002
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6467310 | Method for producing optical fiber base material ingot by grinding while core portion central axis is brought into line with rotational axis of grinding machine | Tadakatsu Shimada, Hideo Hirasawa | 2002-10-22 |