Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6396914 | Method and system for transmitting activation codes to a communication device | David Phillip Silverman | 2002-05-28 |
| 5745553 | On-demand communications services | David Phillip Silverman | 1998-04-28 |