Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |