Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4832720 | Method for producing multi-core optical fiber | Minoru Watanabe, Hiroshi Yokota, Shuzo Suzuki | 1989-05-23 |
| 4822399 | Glass preform for dispersion shifted single mode optical fiber and method for the production of the same | Hiroo Kanamori, Hiroshi Yokota, Gotaro Tanaka, Yoichi Ishiguro, Masahiro Takagi +1 more | 1989-04-18 |