LIEBERT CORPORATION

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
 
 
H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY 3469
 
 
 
H05K PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS 26122
 
 
 
F25B REFRIGERATION MACHINES, PLANTS, OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS 2440
 
 
 
F28F DETAILS OF HEAT-EXCHANGE OR HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION 2233
 
 
 
F25D REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT COVERED BY ANY OTHER SUBCLASS 1926
 
 
 
F28D HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT 1033
 
 
 
H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS 1068
 
 
 
G06F ELECTRIC DIGITAL DATA PROCESSING 9413
 
 
 
F24F AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING 832
 
 
 
G05D SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES 863

Top Patents (by citation)

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Recent Publications

Publication # Title Filing Date Pub Date Intl Class
2016/0363,359 Cooling System With Direct Expansion And Pumped Refrigerant Economization CoolingJun 08, 16Dec 15, 16[F25B]
2016/0359,362 Fast Restart Of Flywheel In Uninterruptible Power Supply System Having Flywheel System/Battery CombinationApr 29, 16Dec 08, 16[H02J]
2016/0336,796 SYSTEM AND METHOD FOR POWER SHARING IN A MULTIPLE UPS SYSTEMMay 10, 16Nov 17, 16[H02J]
2016/0327,342 MICROCHANNEL HEAT EXCHANGER WITH IMPROVEMENT OF DIRT-RESISTING AND ANTI-BLOCKINGDec 29, 14Nov 10, 16[F28D, F28F, F24F]
2016/0308,389 Method For Balancing Power In Paralleled ConvertersMar 04, 16Oct 20, 16[H02J]
2016/0282,390 Real Current MeterMar 21, 16Sep 29, 16[G01R]
2016/0223,620 METHOD FOR DETECTING A FAILING RECTIFIER OR RECTIFIER SOURCEFeb 03, 16Aug 04, 16[G01R, H02M, H02J]
2016/0209,901 SYSTEM AND METHOD FOR RACK MOUNTABLE MODULAR DC POWER UNITSep 04, 14Jul 21, 16[G06F]
2016/0136,791 TOOL SUSPENSION DEVICEJan 24, 16May 19, 16[B25B]
2016/0138,260 System And Method For Modular Data CenterJan 21, 16May 19, 16[E04B]

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9,531,288 Systems and methods for balancing UPS output voltages during transitions between operating modesNov 13, 13Dec 27, 16[H02M, H02J]
9,519,560 Method for automatic mapping of AC phase conductors and identification of AC buses in a multi-bus power systemJan 27, 14Dec 13, 16[G06F]
9,520,874 Operating a static transfer switch to eliminate transformer inrush current in the presence of residual fluxOct 17, 13Dec 13, 16[H01H, H03K, H02J]
9,494,371 Pumped refrigerant cooling system with 1+1 to N+1 and built-in redundancyDec 21, 12Nov 15, 16[B23P, F28D, F28F, F25B, H05K]
9,476,624 Scroll compressor differential pressure control during compressor shutdown transitionsJan 31, 14Oct 25, 16[F04C, F25D, F25B]
9,477,235 Methods of controlling a cooling system based on pressure differences across a scroll compressorJan 31, 14Oct 25, 16[F04C, B29C, F25B, G05D]
9,431,854 Multiple UPS system having multi-way power tie system and intelligent power sharing controlNov 13, 13Aug 30, 16[H02J]
9,373,962 Intelligent arbitration of power line based coordinating signals between multiple UPS buses without any auxiliary signalsJul 30, 12Jun 21, 16[G05B, H01H, B60L, H02J]
9,316,424 Multi-stage cooling system with tandem compressors and optimized control of sensible cooling and dehumidificationApr 13, 12Apr 19, 16[F25B]
9,312,781 Control method during zero-crossing operation of bridge arms in UPSJun 08, 11Apr 12, 16[H02M, H02J]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2014/0139,299 EMI Filter Assemblies For Busbars Of An UPSABANNov 13, 13May 22, 14[H03H]
2013/0139,529 Fan Speed Control For Air-Cooled Condenser In Precision CoolingABANJun 07, 12Jun 06, 13[F25D]
2013/0098,086 VAPOR COMPRESSION COOLING SYSTEM WITH IMPROVED ENERGY EFFICIENCY THROUGH ECONOMIZATIONABANApr 13, 12Apr 25, 13[F25B]
2013/0091,874 Variable Refrigerant Flow Cooling SystemABANApr 03, 12Apr 18, 13[F25B]
2013/0021,037 WIRELESS PORTABLE BATTERY CAPACITY TEST SYSTEMABANJan 20, 12Jan 24, 13[G01R]
2012/0291,984 Kind Of Air Conditioner System And Control Method Of Its Condensing FanABANNov 14, 11Nov 22, 12[F28F, G05D]
2012/0174,612 Computer Room Air Conditioner With Pre-CoolerABANMay 13, 11Jul 12, 12[F28D, F25D]
2012/0078,550 System And Method For Displaying Battery String Cell Data In Polar Coordinate Graphical FormABANMar 25, 11Mar 29, 12[G01R, G06T]
8,063,671 Driving circuit of switch deviceExpiredJun 13, 08Nov 22, 11[H03B]
2011/0279,124 FLOAT CURRENT MONITORABANMay 12, 11Nov 17, 11[G01R]
2011/0195,922 Beta-L-2'-Deoxy-Nucleosides for the Treatment of Hepatitis BABANDec 08, 09Aug 11, 11[C07H, A61P, A61K]
2011/0101,118 CONDENSATION PREVENTION SYSTEM AND METHODS OF USEABANJan 06, 11May 05, 11[F24F]
2010/0296,319 POWER SOURCE MODULE WITH BROAD INPUT VOLTAGE RANGEABANSep 08, 08Nov 25, 10[H02M]
2010/0204,838 ENERGY EFFICIENT AIR CONDITIONING SYSTEM AND METHOD UTILIZING VARIABLE CAPACITY COMPRESSOR AND SENSIBLE HEAT RATIO LOAD MATCHINGABANFeb 11, 10Aug 12, 10[G05B, F28D, F25B, F01C]
2010/0109,545 Automatic Compensation For Degradation Of Optocoupler Light Emitting DiodeABANOct 07, 09May 06, 10[H05B]
2010/0110,621 RACK WITH VERTICAL MOUNTING PROVIDING ROOM FOR RACK PDUABANSep 30, 09May 06, 10[A47F, H05K]
2010/0094,466 INTEGRATED QUIET AND ENERGY EFFICIENT MODES OF OPERATION FOR AIR-COOLED CONDENSERABANSep 15, 09Apr 15, 10[G05B]
2010/0085,708 HIGH-EFFICIENCY, FLUID-COOLED UPS CONVERTERABANOct 06, 09Apr 08, 10[F28D, F28F, H05K]
2009/0251,005 UNDERVOLTAGE TRANSFER DETECTIONABANApr 07, 08Oct 08, 09[H02J]
2009/0217,527 HEAT EXCHANGER CORE TUBE FOR INCREASED CORE THICKNESSABANMay 05, 09Sep 03, 09[B23P]

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