Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4938789 | Raw material supplying device and process | Ichiro Tsuchiya, Hiroshi Yokota, Hideki Minami | 1990-07-03 |
| 4793842 | Method for producing glass preform for optical fiber | Hiroshi Yokota, Hiroo Kanamori, Gotaro Tanaka, Hiroshi Suganuma | 1988-12-27 |
| 4781740 | Method for producing glass preform for optical fiber | Hiroshi Yokota, Yoichi Ishiguro | 1988-11-01 |
| 4765815 | Method for producing glass preform for optical fiber | Hiroshi Yokota, Yoichi Ishiguro | 1988-08-23 |
| 4668263 | Method for producing glass preform for optical fiber | Hiroshi Yokota, Gotaro Tanaka, Hiroo Kanamori, Futoshi Mizutani | 1987-05-26 |