Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6023502 | Method and apparatus for providing telephone billing and authentication over a computer network | Moshiur Rahman | 2000-02-08 |
| 5991381 | Method and apparatus for providing telephone calling card validation over a computer network | Moshiur Rahman | 1999-11-23 |
| 5948071 | System converting a request message using computer protocol to telephone communication protocol for accessing telephone directory assistance information without assistance from an operator | Moshiur Rahman | 1999-09-07 |