Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5364428 | Method for producing glass preform for optical fiber | Yoichi Ishiguro, Akira Urano, Hideo Kakuzen | 1994-11-15 |
| 5306322 | Process for thermal treatment of glass fiber preform | Shinji Ishikawa, Yuichi Ohga, Ichiro Tsuchiya, Hiroo Kanamori, Hiroshi Yokota | 1994-04-26 |