Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7440558 | Telephony security system | Craig Heilmann, Mark Collier, Doug Conyers, Keith S. Pickens, David Buntin +4 more | 2008-10-21 |
| 7231027 | Encapsulation, compression, and encryption of PCM data | Kirk Smith, Keith S. Pickens, Craig Heilmann | 2007-06-12 |
| 6879671 | Virtual private switched telecommunications network | Kirk Smith, Keith S. Pickens, Craig Heilmann | 2005-04-12 |
| 6760420 | Telephony security system | Craig Heilmann, Mark Collier, Doug Conyers, Keith S. Pickens, David Buntin +4 more | 2004-07-06 |
| 6735291 | Virtual private switched telephone network | Keith S. Pickens, Craig Heilmann | 2004-05-11 |
| 6718024 | System and method to discriminate call content type | Craig Heilmann, Todd Beebe, David Buntin, Robert A. Applonie, Keith S. Pickens | 2004-04-06 |
| 6700964 | Encapsulation, compression and encryption of PCM data | Keith S. Pickens, Craig Heilmann, Kirk Smith | 2004-03-02 |