Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4789979 | Optical disk exclusively used for reproduction wherein guide grooves located between data managing information and data recording regions have no track address sections | Makoto Ichinose, Isao Satoh, Tatuo Sugimura | 1988-12-06 |