Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7854157 | Method of elongating optical fiber base material, and apparatus for elongating the same | Waichi Yamamura, Takaaki Nacao, Mitsukuni Sakashita | 2010-12-21 |
| 7788951 | Method of elongating an optical fiber base material | Tadakatsu Shimada, Takaaki Nagao | 2010-09-07 |
| 6220057 | Apparatus and method for drawing a glass ingot | Waichi Yamamura, Tadakatsu Shimada, Hideo Hirasawa | 2001-04-24 |