Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6821707 | Optical information recording medium, producing method thereof and method of recording/erasing/reproducing information | Noboru Yamada, Katsumi Kawahara, Hiroyuki Ohta, Eiji Ohno, Ken'ichi Nagata | 2004-11-23 |