Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12421156 | Method for manufacturing optical fiber glass preform | Hiroki Kojima | 2025-09-23 |
| 11999646 | Manufacturing method of porous glass base material for optical fiber and manufacturing apparatus | Naoto NODA, Hitoshi IINUMA, Hiromasa MIZUKAMI | 2024-06-04 |
| 11378738 | Optical fiber | Hiroki Kojima | 2022-07-05 |
| 11155488 | Apparatus and method for manufacturing porous glass preform for optical fiber | Naoto NODA, Hitoshi IINUMA | 2021-10-26 |
| 10501361 | Optical fiber preform manufacturing method and optical fiber preform manufacturing device | Takaaki Nagao, Hiroyuki Koide | 2019-12-10 |
| 9527764 | Quartz glass manufacturing method using hydrogen obtained by vaporizing liquid hydrogen | Takaaki Nagao, Hiroyuki Koide | 2016-12-27 |
| 8925355 | Optical fiber and method of manufacturing optical fiber preform | — | 2015-01-06 |
| 8839645 | Method of manufacturing optical fiber base material and apparatus of the same | Hiroyuki Koide, Takaaki Nagao | 2014-09-23 |
| 8726693 | Apparatus and method for supplying hydrogen gas, and quartz glass manufacturing apparatus | Takaaki Nagao, Hiroyuki Koide | 2014-05-20 |
| 8701447 | Method of manufacturing optical fiber base material and apparatus of the same | Hiroyuki Koide, Takaaki Nagao | 2014-04-22 |
| 8561431 | Method of manufacturing optical fiber base material | — | 2013-10-22 |
| 8460408 | Hydrogen supply equipment | Takaaki Nagao, Hiroyuki Koide | 2013-06-11 |
| 7752869 | Optical fiber preform, method for manufacturing thereof, and optical fiber obtained by drawing thereof | Tetsuya Otosaka, Hiroshi Oyamada, Jun Abe, Hideo Hirasawa | 2010-07-13 |
| 7574087 | Optical fiber | Hiroshi Oyamada, Yuichi Morishita | 2009-08-11 |
| 7082791 | Apparatus for fabricating soot preform for optical fiber | Go Ogino, Tetsuya Otosaka, Tadakatsu Shimada, Hideo Hirasawa | 2006-08-01 |