Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4831608 | Multi-layer high density information recording carrier having a non-alkali inorganic glass protective layer | Masaru Sato | 1989-05-16 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4831608 | Multi-layer high density information recording carrier having a non-alkali inorganic glass protective layer | Masaru Sato | 1989-05-16 |