Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5422943 | Private branch exchange networks | Thomas M. Cooney, Kenneth E. English, James L. Turner, Robert M. Welsh | 1995-06-06 |
| 5369696 | Intraswitch transition to new line support equipment | William Krauss, Thomas J. Pieper, Bernard G. Ruel, Gilbert Mark Stewart | 1994-11-29 |
| 5309512 | Call waiting deluxe feature | La Sheral Blackmon, James R. Blakley, Cheryl J. Kohn, Brenda L. Sermersheim, Diane M. Zurbriggen | 1994-05-03 |