Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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, Hiroshi Suganuma +1 more | 1989-04-18 |