Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5294523 | Optical information recording medium | Ken'chi Nagata, Noboru Yamada, Masatoshi Takao | 1994-03-15 |
| 5278011 | Reversible optical information-recording medium | Noboru Yamada, Kunio Kimura, Masatoshi Takao | 1994-01-11 |