Issued Patents 2003
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6671249 | OPTICAL RECORDING MEDIUM, DATA RECORDING METHOD FOR REWRITABLE-TYPE PHASE CHANGE TYPE OPTICAL DISC, DATA ERASE METHOD FOR REWRITABLE COMPACT DISC, DATA ERASE METHOD FOR REWRITABLE PHASE CHANGE TYPE RECORDING MEDIUM, READ ONLY DATA ERASE METHOD, AND RECORDING/READOUT APPARATUS | — | 2003-12-30 |
| 6661760 | Optical recording method and optical recording medium | Natsuko Nobukuni | 2003-12-09 |
| 6587425 | Multilevel recording and reproduction method and phase change multilevel recording medium | Takashi Ohno | 2003-07-01 |
| 6567367 | Multilevel recording and reproduction method and phase change multilevel recording medium | Takashi Ohno | 2003-05-20 |