Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5671272 | Current mode ring trip detector | — | 1997-09-23 |
| 5659570 | Circuit and method for loopback test and on-hook transmission integrated in a telephone subscriber line interface circuit | Christopher Ludeman, Donald K. Whitney | 1997-08-19 |
| 5614867 | Current follower with zero input impedance | — | 1997-03-25 |