Issued Patents All Time
Showing 51–66 of 66 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5055121 | Method for producing glass preform for optical fiber | Yoichi Ishiguro, Gotaro Tanaka | 1991-10-08 |
| 5032079 | Furnace for producing high purity quartz glass preform | Ichiro Tsuchiya, Shinji Ishikawa, Masahide Saitoh, Yoichi Ishiguro | 1991-07-16 |
| 5022904 | Method of making optical glass article | Yoichi Ishiguro, Akira Urano, Michihisa Kyoto | 1991-06-11 |
| 4979971 | Method for producing glass preform for optical fiber | Michihisa Kyoto, Minoru Watanabe | 1990-12-25 |
| 4915717 | Method of fabricating optical fiber preforms | Minoru Watanabe, Naoki Yoshioka, Nobuo Inagaki | 1990-04-10 |
| 4880452 | Method for producing glass preform for optical fiber containing fluorine in cladding | Gotaro Tanaka, Michihisa Kyoto, Naoki Yoshioka, Futoshi Mizutani | 1989-11-14 |
| 4846867 | Method for producing glass preform for optical fiber | Hiroshi Yokota, Yoichi Ishiguro, Futoshi Mizutani, Gotaro Tanaka | 1989-07-11 |
| 4822399 | Glass preform for dispersion shifted single mode optical fiber and method for the production of the same | Hiroshi Yokota, Gotaro Tanaka, Yoichi Ishiguro, Masahiro Takagi, Hiroshi Suganuma +1 more | 1989-04-18 |
| 4812155 | Method for production of glass preform for optical fibers | Michihisa Kyoto, Naoki Yoshioka, Gotaro Tanaka, Minoru Watanabe, Motohiro Nakahara | 1989-03-14 |
| 4793842 | Method for producing glass preform for optical fiber | Hiroshi Yokota, Gotaro Tanaka, Hiroshi Suganuma, Toshio Danzuka | 1988-12-27 |
| 4737179 | Method for producing glass preform for optical fiber | Gotaro Tanaka, Hiroshi Yokota, Shigeru Tanaka, Hiroshi Suganuma | 1988-04-12 |
| 4675040 | Method for producing glass preform for single mode optical fiber | Gotaro Tanaka, Futoshi Mizutani, Naoki Yoshioka | 1987-06-23 |
| 4668263 | Method for producing glass preform for optical fiber | Hiroshi Yokota, Gotaro Tanaka, Futoshi Mizutani, Toshio Danzuka | 1987-05-26 |
| 4666488 | Process of producing a highly pure glass tube | Futoshi Mizutani, Gotaro Tanaka | 1987-05-19 |
| 4627866 | Method for producing optical fiber preform | Gotaro Tanaka, Kazunori Chida | 1986-12-09 |
| 4627867 | Method for producing highly pure glass preform for optical fiber | Gotaro Tanaka, Futoshi Mizutani | 1986-12-09 |