Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4837429 | Photodetector for use with an optical recording medium | Isao Umezawa, Haruo Sone | 1989-06-06 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4837429 | Photodetector for use with an optical recording medium | Isao Umezawa, Haruo Sone | 1989-06-06 |