Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5726993 | Signal detector for telephone line repeator remote loopback system | Karl Kelsey | 1998-03-10 |
| 5600656 | Remote loopback apparatus and method for telephone line repeaters | Karl Kelsey | 1997-02-04 |