Issued Patents 2005
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6925178 | Returning ringing signals through the tip amplifier of subscriber-line interface circuitry | John Gammel, David Paul Chabinec | 2005-08-02 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6925178 | Returning ringing signals through the tip amplifier of subscriber-line interface circuitry | John Gammel, David Paul Chabinec | 2005-08-02 |