Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5949870 | System and method for providing local number portability service | John D. Hayduk, James A. Bajzath, Craig Loren Schafer | 1999-09-07 |
| 5870452 | System and method for controlling message looping between network elements | John D. Hayduk, Lawrence Shao-hsien Chien, Alexander Jodidio, Carla A. Wood, Debbie Edwards | 1999-02-09 |