Issued Patents 2005
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6975578 | Optical recording medium with grooves, optical recording medium master with grooves, apparatus for manufacturing optical recording medium master with grooves, and optical recording/reproducing apparatus | Sohmei Endoh, Ikuhiro Hideta | 2005-12-13 |