Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6914940 | Device for improving voice signal in quality | Masato Tanaka, Eiji Shinsho, Yoshinori Shinohara, Kazuhiko Seki | 2005-07-05 |
| 6889184 | Device for improving voice signal in quality | Masato Tanaka, Kazuhiko Seki | 2005-05-03 |