Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6614912 | Sound reproducing device, earphone device and signal processing device therefor | Yuji Yamada | 2003-09-02 |
| 6569919 | Composition exhibiting reversible color change and exterior parts for clock using the same | Koichi Noguchi, Takayoshi Tanaka, Kiichiro Morita | 2003-05-27 |