Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10944280 | Auto adjusting balancer apparatus | — | 2021-03-09 |
| 10855167 | Power converter apparatus and methods using adaptive node balancing | — | 2020-12-01 |
| 10439414 | Auto adjusting balancer apparatus | — | 2019-10-08 |
| 10381917 | Power converter apparatus and methods using adaptive node balancing | — | 2019-08-13 |
| 9607750 | Inductor systems using flux concentrator structures | Larry Van Lynam, Thomas A. Wallace | 2017-03-28 |
| 9397584 | Multi-level converter apparatus and methods using clamped node bias | Haidong Yu | 2016-07-19 |
| 9398723 | Apparatus and methods using heat pipes for linking electronic assemblies that unequally produce heat | George Arthur Navarro | 2016-07-19 |
| 9297862 | Systems and apparatus for fault detection in DC power sources using AC residual current detection | Yu Liu, Debrup Das, Pasi Taimela, Bobby L. Compton | 2016-03-29 |
| 8810069 | System and method for maximizing power output of photovoltaic strings | Yu Liu, Christopher Scott Thompson | 2014-08-19 |
| 8593209 | Resonant tank drive circuits for current-controlled semiconductor devices | Anthony Olivo | 2013-11-26 |
| 7800924 | Power converter apparatus and methods using neutral coupling circuits with interleaved operation | Hans-Erik Pfitzer | 2010-09-21 |
| 7583109 | Apparatus and methods for monitoring parallel-connected power switching devices responsive to drive circuit parameters | George Arthur Navarro | 2009-09-01 |
| 7205875 | Hybrid air/magnetic core inductor | Lei Zeng, Larry Van Lynam | 2007-04-17 |
| 6933626 | Ferroelectric transformer-free uninterruptible power supply (UPS) systems and methods for communications signal distribution systems | — | 2005-08-23 |
| 6753622 | Uninterruptible power supply systems and methods using rectified AC with current control | — | 2004-06-22 |
| 6348782 | Uninterruptible power supply systems, voltage regulators and operating methods employing controlled ferroresonant transformer circuits | John Earle | 2002-02-19 |
| 6172432 | Automatic transfer switch | Paul Schnackenberg | 2001-01-09 |
| 6122181 | Systems and methods for producing standby uninterruptible power for AC loads using rectified AC and battery | — | 2000-09-19 |
| 5680301 | Series/parallel resonant converter | Steven R. Widener | 1997-10-21 |
| 5399913 | Gate-drive circuit | Steven R. Widener, Eric Menzel, Joseph C. Paulakonis | 1995-03-21 |
| 5291383 | Simplified UPS system | — | 1994-03-01 |
| 5057698 | Shunt circuit for reducing audible noise at low loading conditions of a power supply employing a high frequency resonant converter | Steven R. Widener | 1991-10-15 |
| 4988889 | Power source for emergency lighting systems | — | 1991-01-29 |
| 4935861 | Uninterrupted power supply having no low frequency power magnetics | Robert W. Johnson, William J. Raddi | 1990-06-19 |
| 4200830 | Series resonant battery charger and control therefor | Glenn Smollinger | 1980-04-29 |