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 3066
 
 
 
F25B REFRIGERATION MACHINES, PLANTS, OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS 2042
 
 
 
H05K PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS 18126
 
 
 
F25D REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT COVERED BY ANY OTHER SUBCLASS 1429
 
 
 
H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS 1069
 
 
 
F28F DETAILS OF HEAT-EXCHANGE OR HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION 942
 
 
 
G06F ELECTRIC DIGITAL DATA PROCESSING 8414
 
 
 
H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF 884
 
 
 
G05D SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES 758
 
 
 
F24F AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING 629

Top Patents (by citation)

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Recent Publications

Publication # Title Filing Date Pub Date Intl Class
2016/0094,209 METHOD AND CIRCUIT FOR ELIMINATING TRANSFORMER SATURATION IN THE PRESENCE OF DC OFFSET VOLTAGESep 11, 15Mar 31, 16[H03K]
2016/0084,539 COOLING SYSTEM HAVING A CONDENSER WITH A MICRO-CHANNEL COOLING COIL AND SUB-COOLER HAVING A FIN-AND-TUBE HEAT COOLING COILSep 16, 15Mar 24, 16[F25B]
2016/0061,495 Vapor Compression Cooling System With Improved Energy Efficiency Through EconomizationOct 09, 15Mar 03, 16[F25B]
2015/0244,206 3-WIRE TRANSFORMER-FREE UPS SYSTEM AND METHOD OF CONTROL TO REDUCE COMMON MODE CURRENTFeb 06, 15Aug 27, 15[H02M, H02J]
2015/0230,367 High Efficiency Cooling SystemApr 22, 15Aug 13, 15[F25D, F25B, H05K]
2015/0216,087 METHOD OF RETROFITTING COMPUTER ROOM AIR CONDITIONER TO INCREASE A MAXIMUM TEMPERATURE DELTAApr 13, 15Jul 30, 15[H05K]
2015/0155,793 REPETITIVE SERVOMECHANISM CONTROLLER FOR UNINTERRUPTIBLE POWER SUPPLY SYSTEMNov 14, 14Jun 04, 15[H02M]
2015/0137,604 METHOD TO SELECT OPTIMAL SYNCHRONIZATION SOURCE IN A MULTIPLE UNINTERRUPTIBLE POWER SUPPLY SYSTEMOct 31, 14May 21, 15[H02J]
2015/0098,177 SYSTEM AND METHOD FOR MODULAR DATA CENTEROct 01, 14Apr 09, 15[H05K]
2015/0027,139 APPARATUS AND METHOD FOR SUBCOOLING CONTROL BASED ON SUPERHEAT SETPOINT CONTROLOct 15, 14Jan 29, 15[F25B]

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
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]
9,297,571 Device and methodology for the removal of heat from an equipment rack by means of heat exchangers mounted to a doorJul 02, 12Mar 29, 16[F25D]
9,268,000 System and method for improved accuracy in battery resistance measurement systemsFeb 27, 14Feb 23, 16[G01R, G01N]
9,270,160 Repetitive servomechanism controller for uninterruptible power supply systemNov 14, 14Feb 23, 16[H02M, H02J]
9,243,822 Cooling system for high density heat loadAug 31, 12Jan 26, 16[F25D, F25B]
9,243,823 Cooling system for high density heat loadSep 10, 12Jan 26, 16[F25D, F25B]
9,203,266 UPS system and method of supplying power to non-linear loadJun 29, 12Dec 01, 15[H02J]
9,140,475 Receiver tank purge in vapor compression cooling system with pumped refrigerant economizationNov 13, 13Sep 22, 15[F25B]
9,083,038 Battery cell terminal quick connect clamp with connecting tabOct 09, 13Jul 14, 15[G01R, H01R, H01M]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
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]
2009/0211,773 FIRE SUPPRESSION SYSTEM AND ASSOCIATED METHODSABANMay 01, 09Aug 27, 09[A62C]

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