Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5684830 | Noise removing device and data communication apparatus using the same | Yuji Ichikawa, Katsuya Nakagawa, Akira Imai | 1997-11-04 |
| 5602327 | Leakage-sound detecting apparatus | Yukio Torizuka, Kouji Kitazume | 1997-02-11 |