Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4331843 | Apparatus for controlling and indicating the integrity of the connection of telephone subscribers to a switching system | Lloyd A. Tarr, John Taylor | 1982-05-25 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4331843 | Apparatus for controlling and indicating the integrity of the connection of telephone subscribers to a switching system | Lloyd A. Tarr, John Taylor | 1982-05-25 |