Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857967 | Light source device | Hidetoshi Yasumoto | 1989-08-15 |
| 4821338 | Optical signal receiving apparatus with compensation for peripheral light | Akira Kataoka, Masayasu Hirano, Naoya Takata | 1989-04-11 |