Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5187733 | Verification of subscriber lines prior to cutover to a new switching system | Robert R. Beffel, Ellen R. Blood, Paul R. Bufkin, Jerry G. Miller, James L. Turner | 1993-02-16 |