Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8004863 | Circuit device and method of providing feedback across an isolation barrier | Richard Bruce Webb | 2011-08-23 |
| 7541790 | Method and apparatus for power savings in a switching regulator | Richard Bruce Webb | 2009-06-02 |
| 7450360 | Multi-mode regulator | — | 2008-11-11 |
| 6990191 | Method and apparatus for handling voice and data signals | Jeffrey J. Anderson, Merle L. Miller | 2006-01-24 |
| 6778663 | Method and apparatus for sensing current | — | 2004-08-17 |
| 6728370 | Method and apparatus for impedance matching | Jeffrey J. Anderson, Carlin D. Cabler | 2004-04-27 |
| 6356624 | Method and apparatus for detecting and measuring foreign voltages | Russell J. Apfel, Richard Bruce Webb | 2002-03-12 |
| 5878133 | Digital direct current feed control for a communication system | Yan Zhou | 1999-03-02 |
| 5809109 | Integrated ring sensor with fault detection | Michael Moyal | 1998-09-15 |
| 5640451 | Power cross detection using loop current and voltage | — | 1997-06-17 |
| 5638440 | Protection circuit for telephone systems | Michael A. Nix, Sergio R. Ramirez | 1997-06-10 |
| 5636273 | Integrated ring detection circuit and power cross detection circuit with persistence timers | Sergio R. Ramirez | 1997-06-03 |
| 5249226 | Apparatus for controlling a current supply device | — | 1993-09-28 |