Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7135235 | Optical fiber preform and the method of producing the same | Yasuhiro Naka, Nobuaki Orita | 2006-11-14 |
| 6827883 | Optical fiber preform and the method of producing the same | Yasuhiro Naka, Nobuaki Orita | 2004-12-07 |
| 6823125 | Optical fiber base material, its manufacturing method and optical fiber | Kazuto Hirabayashi | 2004-11-23 |
| 6542680 | Optical fiber preform | Masahide Kuwabara, Kazuto Hirabayashi | 2003-04-01 |