Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6791938 | Optical recording medium, master disc for the preparation of the optical recording medium and optical recording and/or reproducing apparatus | — | 2004-09-14 |
| 6683832 | Optical recording/reproducing apparatus for writing and/or reading data to and/or from optical recording medium having data recorded in pit trains of mutually different depths | — | 2004-01-27 |