Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7181005 | Telephone interface circuit | Glen F. Evans | 2007-02-20 |
| 5297198 | Two-way voice communication methods and apparatus | Joseph R. Centurrino, James F. Scheidemann | 1994-03-22 |