Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7948778 | Self-testing power supply apparatus, methods and computer program products | Hans-Erik Pfitzer, John G. Tracy, Miguel Chavez, Frederick Tassitino, Jason Scott Anderson | 2011-05-24 |
| 7723863 | Power systems and methods using an uniterruptible power supply to transition to generator-powered operation | Robert W. Johnson, Ian T. Wallace, David Glenn Loucks, Timothy Hedquist | 2010-05-25 |
| 7635967 | Generator systems and methods using timing reference signal to control generator synchronization | David Glenn Loucks | 2009-12-22 |
| 7566990 | Power systems and methods using an induction generator in cooperation with an uninterruptible power supply | David Glenn Loucks, John C. Merrison, Robert W. Johnson, Ian T. Wallace, Timothy Hedquist | 2009-07-28 |
| 7508094 | UPS systems having multiple operation modes and methods of operating same | Robert W. Johnson, Ove Ohman, Joseph C. Paulakonis, Kevin Lee, Pasi Taimela | 2009-03-24 |
| 7050312 | Multi-mode uninterruptible power supplies and methods of operation thereof | John G. Tracy, Miguel Chavez, Robert W. Johnson | 2006-05-23 |
| 5896280 | Frequency converter and improved UPS employing the same | Jeff Gucyski, Robert W. Johnson | 1999-04-20 |
| 5757286 | Method and a device for the registration of the movement of a vehicle | Folke Isaksson | 1998-05-26 |
| 4272783 | Correlation follower for tracking an object | Lars-Ake Warnstam, Georg Ludvigsson | 1981-06-09 |