Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4832720 | Method for producing multi-core optical fiber | Hiroshi Yokota, Shuzo Suzuki, Hiroshi Suganuma | 1989-05-23 |
| 4812155 | Method for production of glass preform for optical fibers | Michihisa Kyoto, Naoki Yoshioka, Gotaro Tanaka, Hiroo Kanamori, Motohiro Nakahara | 1989-03-14 |
| 4804247 | Quartz glass optical fiber | Michihisa Kyoto, Shuzo Suzuki, Motohiro Nakahara | 1989-02-14 |
| 4804393 | Methods for producing optical fiber preform and optical fiber | Koji Yano, Michihisa Kyoto, Masao Hoshikawa | 1989-02-14 |
| 4797143 | Process for the production of optical fiber preforms | Kazunori Chida, Hiroshi Yokota, Michihisa Kyoto, Hisao Sato, Naoki Yoshioka | 1989-01-10 |