Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5033815 | Optical transmission fiber and process for producing the same | Takao Edahiro, Minoru Watanabe | 1991-07-23 |
| 4975102 | Optical transmission fiber and process for producing the same | Takeo Edahiro, Minoru Watanabe | 1990-12-04 |
| 4528010 | Process for producing optical glass product | Takao Edahiro, Nobuo Inagaki | 1985-07-09 |
| 4436542 | Process for the production of an optical glass article | — | 1984-03-13 |
| 4410345 | Method of producing optical waveguide | Yuichi Usui, Shigeo Murai, Minoru Watanabe | 1983-10-18 |
| 4402720 | Process for preparing glass preform for optical fiber | Takao Edahiro, Minoru Watanabe | 1983-09-06 |
| 4389233 | Process for the production of an optical glass article | Minoru Watanabe | 1983-06-21 |
| 4326869 | Method of producing optical waveguide | Minoru Watanabe, Yuichi Usui | 1982-04-27 |
| 4295869 | Process for producing optical transmission fiber | Satoshi Shiraishi, Kunio Fujiwara | 1981-10-20 |
| 4242375 | Process for producing optical transmission fiber | Satoshi Shiraishi, Kunio Fujiwara | 1980-12-30 |
| 4225330 | Process for producing glass member | Hideo Kakuzen, Yuichi Usui | 1980-09-30 |