Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5592473 | Private branch exchange system and methods for operating same | Amy K. Leach | 1997-01-07 |
| 5313459 | Private branch exchange system and methods for operating same | — | 1994-05-17 |