Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5642406 | Tone recognition method using tone learning operation in an automatic answering system | — | 1997-06-24 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5642406 | Tone recognition method using tone learning operation in an automatic answering system | — | 1997-06-24 |