Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5675607 | Method and apparatus for facilitating the making of card calls | Albert Friedes, Monowar Hossain, Dooyong Lee | 1997-10-07 |
| 5550551 | Position monitoring system and method | — | 1996-08-27 |
| 5481600 | Instant calling card provisioning system | — | 1996-01-02 |
| 5450479 | Method and apparatus for facilitating the making of card calls | Albert Friedes, Monowar Hossain, Dooyong Lee | 1995-09-12 |