Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8232679 | Uninterruptible power supplies with converter operation conditioned upon static switch commutation and methods of operation thereof | Rennie Bobb, Paul Lukosius, John G. Tracy | 2012-07-31 |
| 7948778 | Self-testing power supply apparatus, methods and computer program products | Hans-Erik Pfitzer, Rune Lennart Jonsson, John G. Tracy, Miguel Chavez, Jason Scott Anderson | 2011-05-24 |
| 7638899 | Nested redundant uninterruptible power supply apparatus and methods | John G. Tracy | 2009-12-29 |
| 7502237 | Power waveform harmonic analysis using summed samples | Pratik Shirish Pratel | 2009-03-10 |
| 7405494 | AC power supply apparatus, methods and computer program products using PWM synchronization | Hans-Erik Pfitzer, Jason Scott Anderson, Michael Westerfield | 2008-07-29 |
| 7400066 | Apparatus and methods for UPS bypass monitoring and control | Jason Scott Anderson, Michael Westerfield | 2008-07-15 |
| 7247955 | PWM power supplies using controlled feedback timing and methods of operating same | John G. Tracy, Hans-Erik Pfitzer, Rennie Bobb, Julius Isaiah Rice | 2007-07-24 |
| 6629247 | Methods, systems, and computer program products for communications in uninterruptible power supply systems using controller area networks | Richard Hall, Miguel Chavez | 2003-09-30 |
| 6549440 | AC power supply apparatus and methods providing output control based on estimated instantaneous reactive power | Pasi Taimela | 2003-04-15 |
| 6201720 | Apparatus and methods for space-vector domain control in uninterruptible power supplies | John G. Tracy, Edward Akbari, Miguel Chavez | 2001-03-13 |
| 5745355 | Wireless selective tripping of AC power systems connected in parallel | John G. Tracy | 1998-04-28 |
| 5745356 | Independent load sharing of AC power systems connected in parallel | John G. Tracy | 1998-04-28 |
| 5633539 | Uninterruptible power supply input power walk-in | — | 1997-05-27 |