Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8443581 | Method and apparatus for producing optical fiber | Naruki Koshimizu, Yuji Abe, Tetsuya Hayashi | 2013-05-21 |
| 8245541 | Equipment for providing twist to an optical fiber | Mitsuru Takagi, Yuji Abe, Hisashi Kasai | 2012-08-21 |
| 6978641 | Method for cutting glass rod and cutting device for use therein | Takashi Sugiyama | 2005-12-27 |
| 5639290 | Process for producing a glass preform for an optical fiber and apparatus for the same | Koji Takata, Fumitaka Uchino, Koji Amemiya, Yuji Takahashi | 1997-06-17 |
| 5133796 | Air-tight sintering furnace for the production of a quartz preform | Ichiro Tsuchiya, Masahide Saito, Shinji Ishikawa | 1992-07-28 |
| 4545801 | Raw material supply device | Tetsuo Miyajiri, Hiroshi Yokota, Tamio Tsurita, Motohiro Nakahara | 1985-10-08 |