Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883953 | Spectroscopic method and apparatus for measuring sugar concentrations | Katsue Koashi | 1989-11-28 |
| 4871695 | Process for the production of glass | Koji Seki, Hiroshi Morishita, Kiyoshi Ohno | 1989-10-03 |
| 4846867 | Method for producing glass preform for optical fiber | Hiroo Kanamori, Yoichi Ishiguro, Futoshi Mizutani, Gotaro Tanaka | 1989-07-11 |
| 4832720 | Method for producing multi-core optical fiber | Minoru Watanabe, Shuzo Suzuki, Hiroshi Suganuma | 1989-05-23 |
| 4822399 | Glass preform for dispersion shifted single mode optical fiber and method for the production of the same | Hiroo Kanamori, Gotaro Tanaka, Yoichi Ishiguro, Masahiro Takagi, Hiroshi Suganuma +1 more | 1989-04-18 |
| 4797143 | Process for the production of optical fiber preforms | Kazunori Chida, Michihisa Kyoto, Hisao Sato, Minoru Watanabe, Naoki Yoshioka | 1989-01-10 |