Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884859 | Optical attenuator and manufacturing method for making same | Hiroyoshi Yamamoto, Toshiharu Takesue | 1989-12-05 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884859 | Optical attenuator and manufacturing method for making same | Hiroyoshi Yamamoto, Toshiharu Takesue | 1989-12-05 |