Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE40992 | Method and system for blocking unwanted communications | Brian Cartmell | 2009-11-17 |
| 7039949 | Method and system for blocking unwanted communications | Brian Cartmell | 2006-05-02 |
| 5673306 | Cellular rental phone system and method having realtime data collection and billing | Charles Gregory Amadon, Rick F. Combest, David M. Stanhope | 1997-09-30 |
| 5301223 | Cellular telephone system with remote programming, voice responsive registration and real time billing | Charles Gregory Amadon, Rick F. Combest, David M. Stanhope | 1994-04-05 |