Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7496091 | Virtual PBX system | Thomas J. Galvin, Michael Kirchner, Mark O'Brien, Joel Hanson | 2009-02-24 |
| 6775272 | Virtual PBX system | Thomas J. Galvin, Michael Kirchner, Mark O'Brien, Joel Hanson | 2004-08-10 |
| 6393017 | Virtual PBX system | Thomas J. Galvin, Michael Kirchner, Mark O'Brien, Joel Hanson | 2002-05-21 |