Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4788015 | Process for preparation of optical disk substrate | Kazunari Sakai | 1988-11-29 |
| 4548889 | Optical recording medium | Yuhei Nemoto, Sadaaki Shigeta | 1985-10-22 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4788015 | Process for preparation of optical disk substrate | Kazunari Sakai | 1988-11-29 |
| 4548889 | Optical recording medium | Yuhei Nemoto, Sadaaki Shigeta | 1985-10-22 |