Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6833667 | Organic electroluminescence element and image forming apparatus or portable terminal unit using thereof | Takafumi HAMANO, Hisanori Sugiura, Naohide Wakita, Hiroshi Yamaguchi, Yasuhiro Tanaka | 2004-12-21 |
| 6829209 | OBJECTIVE FOR OPTICAL DISK, OPTICAL HEAD DEVICE AND OPTICAL INFORMATION RECORDING/REPRODUCING APPARATUS BOTH COMPRISING THE SAME, MOLD FOR FORMING LENS, METHOD FOR MACHINING MOLD FOR FORMING LENS, AND SHAPE MEASURING INSTRUMENT | Yasuhiro Tanaka, Michihiro Yamagata | 2004-12-07 |
| 6807017 | Objective lens and optical head device | Yasuhiro Tanaka, Michihiro Yamagata | 2004-10-19 |