Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6804335 | Method for providing telephonic services | — | 2004-10-12 |
| 6111940 | Method for providing telephonic services | — | 2000-08-29 |
| 5802160 | Multi-ring telephone method and system | David Silver | 1998-09-01 |
| 5751794 | Proactive voice mail service | David Friend | 1998-05-12 |
| 5729595 | Never-busy facsimile service | David Friend | 1998-03-17 |
| 5146491 | Telephone billing method | David Silver | 1992-09-08 |