Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5422943 | Private branch exchange networks | Kenneth E. English, James L. Turner, Robert M. Welsh, Kathleen C. Whildin | 1995-06-06 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5422943 | Private branch exchange networks | Kenneth E. English, James L. Turner, Robert M. Welsh, Kathleen C. Whildin | 1995-06-06 |