Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9065679 | System providing land mobile radio content using a cellular data network | John Vaughan | 2015-06-23 |
| 8792464 | Communication network for detecting uncooperative communications device and related methods | Paul Voglewede, Nick Andrew Van Stralen, William N. Furman, Clifford Hessel, Fred C. Kellerman +2 more | 2014-07-29 |
| 8359066 | Multimode land mobile radio | John Vaughan | 2013-01-22 |
| 8279868 | System providing land mobile radio content using a cellular data network | John Vaughan | 2012-10-02 |
| 8274933 | Wireless communication network providing multi-hop communications | Gregory Henderson, Thomas A. Hengeveld, Daniel W. Ericson, Reid Henry Johnson | 2012-09-25 |
| 8233422 | Radio frequency multicasting | — | 2012-07-31 |
| 8194682 | Multiple protocol land mobile radio system | John Vaughan | 2012-06-05 |
| 8169983 | Transcoder architecture for land mobile radio systems | William Oscar Janky, Thomas A. Hengeveld | 2012-05-01 |
| 8145262 | Multimode land mobile radio | John Vaughan | 2012-03-27 |
| 7929484 | Wireless communication network providing multi-hop communications | Gregory Henderson, Thomas A. Hengeveld, Daniel W. Ericson, Reid Henry Johnson | 2011-04-19 |
| 7917748 | Secure group secret distribution | Thomas A. Hengeveld | 2011-03-29 |
| 7916684 | Wireless communication network providing communication between mobile devices and access points | Gregory Henderson | 2011-03-29 |
| 7839811 | Radio frequency multicasting | — | 2010-11-23 |
| 7599496 | Secure encryption key distribution | Thomas A. Hengeveld | 2009-10-06 |
| 7522730 | Universal microphone for secure radio communication | John Vaughan | 2009-04-21 |
| 7151476 | Radar system having a beamless emission signature | Robert Egri, John Vaughan | 2006-12-19 |
| 6035196 | Automatic cell transfer based on reverse channel characteristics | Thomas A. Hengeveld | 2000-03-07 |
| 6009553 | Adaptive error correction for a communications link | Thomas A. Hengeveld, Michael Axford | 1999-12-28 |
| 5226114 | Television pictures | Jae S. Lim | 1993-07-06 |
| 4838685 | Methods and apparatus for motion estimation in motion picture processing | Jae S. Lim | 1989-06-13 |