Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5592473 | Private branch exchange system and methods for operating same | William T. Matern | 1997-01-07 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5592473 | Private branch exchange system and methods for operating same | William T. Matern | 1997-01-07 |