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Class Information
Number: 307/87
Name: Electrical transmission or interconnection systems > Plural supply circuits or sources > Connecting or disconnecting > Condition responsive > Attainment of voltage, frequency or phase relationship
Description: Subject matter in which the condition is the obtainment of a certain voltage, frequency or phase relationship.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7622823 |
Uninterruptible power supply with low leakage current |
Nov. 24, 2009 |
| 7608947 |
Back-up power supply systems |
Oct. 27, 2009 |
| 7589438 |
Source phase sensitive transfer method and apparatus |
Sep. 15, 2009 |
| 7545659 |
Method and apparatus for cycle error correction for a power converter device, such as an electronic power inverter |
Jun. 9, 2009 |
| 7528504 |
Automatic power adapter |
May. 5, 2009 |
| 7528499 |
Method and system for facilitating no-break power transfer |
May. 5, 2009 |
| 7459804 |
Static transfer switch device and method |
Dec. 2, 2008 |
| 7417337 |
Method and system for facilitating no-break power transfer |
Aug. 26, 2008 |
| 7408272 |
Method and device for supplying electric energy power to an appliance |
Aug. 5, 2008 |
| 7400493 |
Circuit breaking link status detection and reporting circuit |
Jul. 15, 2008 |
| 7382064 |
Supply voltage identifier |
Jun. 3, 2008 |
| 7362009 |
Chain reaction control circuit for parallel power supply |
Apr. 22, 2008 |
| 7362600 |
Method and apparatus for cycle error correction for a power converter device, such as an electronic power inverter |
Apr. 22, 2008 |
| 7362601 |
Power supply device |
Apr. 22, 2008 |
| 7282815 |
Method and circuit arrangement for minimizing interference in an electronic circuit |
Oct. 16, 2007 |
| 7233081 |
Power-supply device |
Jun. 19, 2007 |
| 7215040 |
Half-bridge converter with zero-voltage switching and snubber |
May. 8, 2007 |
| 7171570 |
Method and apparatus for selectively increasing the operating speed of an electronic circuit |
Jan. 30, 2007 |
| 7141892 |
Power supply method of a line interactive UPS and the line interactive UPS |
Nov. 28, 2006 |
| 7116082 |
Synchronization controller for multiple pulsed alternator applications |
Oct. 3, 2006 |
| 7107162 |
Determining an operational limit of a power transmission line |
Sep. 12, 2006 |
| 7106607 |
Combined AC-DC to DC converter |
Sep. 12, 2006 |
| 7084526 |
Intelligent electrical devices |
Aug. 1, 2006 |
| 7038522 |
System and method for redundant power supply connection |
May. 2, 2006 |
| 7023109 |
Uninterruptible power source apparatus |
Apr. 4, 2006 |
| 7015597 |
Power regulator for power inverter |
Mar. 21, 2006 |
| 6984900 |
Intelligent electrical switch |
Jan. 10, 2006 |
| 6956304 |
Integrated circuit and method for controlling a power supply thereof |
Oct. 18, 2005 |
| 6883056 |
IEEE 1394 apparatus capable of making power class coincide even at the change over of a power supply to be used |
Apr. 19, 2005 |
| 6864600 |
Apparatus and method for providing multiple power supply voltages to an integrated circuit |
Mar. 8, 2005 |
| 6781258 |
Cooling device of electronic apparatus |
Aug. 24, 2004 |
| 6747372 |
Distributed control method for multiple connected generators |
Jun. 8, 2004 |
| 6738269 |
Line linkage protective device for electricity generation equipment |
May. 18, 2004 |
| 6700222 |
Power transfer system |
Mar. 2, 2004 |
| 6661207 |
Apparatus and method for protecting synchronous generators against off-nominal frequency deviation and alternating forces excitation |
Dec. 9, 2003 |
| 6661118 |
Differential voltage limiter |
Dec. 9, 2003 |
| 6650028 |
Dual isolated input power supply |
Nov. 18, 2003 |
| 6628013 |
Redundant power subsystem |
Sep. 30, 2003 |
| 6600239 |
Active circuit protection for switched power supply system |
Jul. 29, 2003 |
| 6593671 |
Process and apparatus for supplying electric energy to the wiring of a motor vehicle |
Jul. 15, 2003 |
| 6580311 |
Circuit configuration for supplying voltage to an integrated circuit via a pad |
Jun. 17, 2003 |
| 6566769 |
Three phase flat cable inductance balancer |
May. 20, 2003 |
| 6545481 |
Power interruption detection |
Apr. 8, 2003 |
| 6535405 |
Power supply device having two AC power inputs |
Mar. 18, 2003 |
| 6525434 |
Binary demand switching circuit |
Feb. 25, 2003 |
| 6522513 |
Back-electromotive force protection circuit |
Feb. 18, 2003 |
| 6466627 |
Pulse signal transmitting circuit and subscriber's line terminal apparatus using the pulse signal transmitting circuit |
Oct. 15, 2002 |
| RE37876 |
Power supply switch reference circuitry |
Oct. 15, 2002 |
| 6465912 |
Power transfer device |
Oct. 15, 2002 |
| 6462434 |
Power supply isolation circuit and method |
Oct. 8, 2002 |
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