Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5693115 | Process for production of glass preform for optical fiber including consolidating in a furnace with a temperature gradient | Masumi Ito, Toshio Danzuka, Sumio Hoshino, Ichiro Tsuchiya | 1997-12-02 |
| 5685889 | Method for flame abrasion of glass preform | Toshio Danzuka | 1997-11-11 |
| 5674305 | Method for flame abrasion of glass preform | Susumu Uchida | 1997-10-07 |
| 5674306 | Method and apparatus for drawing glass preform for optical fiber | Sumio Hoshino, Toshio Danzuka, Katsuzo Mukai | 1997-10-07 |