Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7979051 | Toll free calling account recharge system and method | Douglas M. Fieldhouse | 2011-07-12 |
| 7539480 | Toll-free calling account recharge system and method | Douglas M. Fieldhouse | 2009-05-26 |
| 7242922 | Toll free calling account recharge system and method | Douglas M. Fieldhouse | 2007-07-10 |