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Uninterruptible power supply system having stranded power recovery |
Kevin B. Carney, Peter A. Panfil |
2023-03-21 |
| 11283289 |
Uninterruptible power supply system having stranded power recovery |
Kevin B. Carney, Peter A. Panfil |
2022-03-22 |
| 11183869 |
System and method for generator frequency control during UPS power walk-in |
Peter A. Panfil, Brian P. Heber |
2021-11-23 |
| 10439431 |
Method to reduce inrush currents in a transformer-less rectifier uninterruptible power supply system |
Charles F. Blair, Xian Chen |
2019-10-08 |
| 10404094 |
System and method for power sharing in a multiple UPS system |
Charles F. Blair, Gregg J. Nelson |
2019-09-03 |
| 10340733 |
3-wire transformer-free UPS system and method of control to reduce common mode current |
Edwin Shires, Brian P. Heber, Charles F. Blair |
2019-07-02 |
| 10277066 |
Method for balancing power in paralleled converters |
Brian P. Heber |
2019-04-30 |
| 9915687 |
Real current meter |
James K. Martin, Charles F. Blair |
2018-03-13 |
| 9876390 |
Techniques for improving operation of static transfer switches during voltage disturbances |
Brian P. Heber, Russell E. Shetler, Jr., Peter A. Panfil |
2018-01-23 |
| 9531288 |
Systems and methods for balancing UPS output voltages during transitions between operating modes |
Brian P. Heber, Russell E. Shetler, Jr. |
2016-12-27 |
| 9520874 |
Operating a static transfer switch to eliminate transformer inrush current in the presence of residual flux |
James M. Miller |
2016-12-13 |
| 9268000 |
System and method for improved accuracy in battery resistance measurement systems |
Brian Scott Cogar, Russell E. Shetler, Jr., Charles O'Donnell |
2016-02-23 |
| 8271146 |
Maximized battery run-time in a parallel UPS system |
Brian P. Heber, Kevin Eschhofen, Mohammad Nanda Rahmana Marwali |
2012-09-18 |
| 7987023 |
Humidity control for multiple unit A/C system installations |
John E. Saunders, John F. Christensen |
2011-07-26 |
| 7668624 |
Maximized battery run-time in a parallel UPS system |
Brian P. Heber, Kevin Eschhofen, Mohammad Nanda Rahmana Marwali |
2010-02-23 |
| 7566988 |
Method and apparatus for monitoring UPS power sources |
Brian P. Heber, Mohammad Nanda Rahmana Marwali, Paul Taylor |
2009-07-28 |
| 7459804 |
Static transfer switch device and method |
Mohammad Nanda Rahmana Marwali |
2008-12-02 |
| 7352082 |
Transfer switch device and method |
Mohammad Nanda Rahmana Marwali, Brian P. Heber, Jeffery Earl Grant Powell |
2008-04-01 |
| 6917124 |
Uninterruptible power supply |
Russell E. Shetler, Jr., Brian P. Heber, Kevin Eschhofen, Ramesh Subramanian, Nelson John Norris +7 more |
2005-07-12 |
| RE31398 |
Electronic audio signalling device for telephones |
Dennis J. Denen |
1983-09-27 |
| 4214131 |
Electronic audio signalling device for telephones |
D. Joseph Denen |
1980-07-22 |