Issued Patents All Time
Showing 26–39 of 39 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 |
| 5513983 | Apparatus for vitrifying soot preform for optical fiber | Masumi Ito, Ichiro Tuchiya, Toshio Danzuka, Sumio Hoshino | 1996-05-07 |
| 5474589 | UV light-permeable glass and article comprising the same | Shinji Ishikawa, Tatsuhiko Saito, Hiroshi Yokota, Michihisa Kyoto | 1995-12-12 |
| 5446820 | Mode field diameter conversion optical fiber | Shinji Ishikawa, Hiroo Kanamori, Koji Nakazato, Masayuki Nishimura | 1995-08-29 |
| 5417399 | Apparatus for supporting article in heating furnace | Tatsuo Saito, Kohei Kobayashi, Kouji TAKATA, Hikaru Sato | 1995-05-23 |
| 5338327 | Method of flame abrasion of glass preform | Toshio Danzuka, Masahide Saito, Kouji Amemiya, Hiroshi Yokota | 1994-08-16 |
| 5320658 | Process of drawing optical fiber | Shinji Ishikawa, Hiroo Kanamori, Ichiro Yoshimura, Horoshi Yokota | 1994-06-14 |
| 5306322 | Process for thermal treatment of glass fiber preform | Shinji Ishikawa, Ichiro Tsuchiya, Hiroo Kanamori, Hiroshi Yokota, Michihisa Kyoto | 1994-04-26 |
| 5259856 | Method of producing glass preform in furnace for heating glass | Shinji Ishikawa, Hiroo Kanamori, Ichiro Tsuchiya, Hiroshi Yokota | 1993-11-09 |
| 5238479 | Method for producing porous glass preform for optical fiber | Toshio Danzuka, Hiroo Kanamori, Hiroshi Yokota | 1993-08-24 |
| 5106401 | Process for thermal treatment of glass fiber preform | Shinji Ishikawa, Ichiro Tsuchiya, Hiroo Kanamori, Hiroshi Yokota, Michihisa Kyoto | 1992-04-21 |