Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5034977 | Phase accumulation dual tone multiple frequency generator | Yarn-Chern Chen | 1991-07-23 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5034977 | Phase accumulation dual tone multiple frequency generator | Yarn-Chern Chen | 1991-07-23 |