Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4846867 | Method for producing glass preform for optical fiber | Hiroshi Yokota, Hiroo Kanamori, 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 | Hiroo Kanamori, Hiroshi Yokota, Gotaro Tanaka, Masahiro Takagi, Hiroshi Suganuma +1 more | 1989-04-18 |