Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880289 | Two-way optical transmission system | Akihiko Takase, Atsushi Takai, Satoshi Aoki, Tsutomu Yoshiya, Shoji Yamada | 1989-11-14 |
| 4871221 | Optical waveguide device | — | 1989-10-03 |
| 4856859 | Optical waveguide and method for fabricating the same | — | 1989-08-15 |
| 4842359 | Optical star coupler and method of manufacturing the same | Minoru Maeda, Masayoshi Kameyama, Yasushi Ikuta, Hiroshi Araki, Shigeru Oho | 1989-06-27 |
| 4822128 | Optical fiber star coupler and method of manufacturing the same | Hirohisa Sano | 1989-04-18 |
| 4801190 | Two-way optical fiber transmission network | — | 1989-01-31 |