Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4841501 | Plastic substrate for optical disk and process for producing the same | Yoshio Onizawa, Mitsuru Yamashita | 1989-06-20 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4841501 | Plastic substrate for optical disk and process for producing the same | Yoshio Onizawa, Mitsuru Yamashita | 1989-06-20 |