Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6426936 | Phase-change medium usable in phase-difference tracking | Michiaki Shinotsuka, Hajime Yuzurihara, Hiroko Tashiro | 2002-07-30 |
| 6391417 | Optical information recording medium | Hajime Yuzurihara, Hiroko Tashiro | 2002-05-21 |