Inventor · disambiguated record
Der-Kai Hung
Also filed as: HUNG DER-KAI
29 granted patents·5 pending applications·55 citations·filing 2010–2023
94Inventor score
Top patents by PatentIndex Score
34 records- 0188US10801765B2Variable speed blower control for HVAC systemsLENNOX IND INC·Filed 2018·Granted Oct 13, 2020·4 cites·20 claims
- 0288US8931288B2Pressure regulation of an air conditionerQU YI·Filed 2012·Granted Jan 13, 2015·7 cites·20 claims
- 0387US9297565B2Charge management for air conditioningLENNOX IND INC·Filed 2013·Granted Mar 29, 2016·11 cites·20 claims
- 0485US9488400B2System for managing lubricant levels in tandem compressor assemblies of an HVAC systemLENNOX IND INC·Filed 2014·Granted Nov 8, 2016·5 cites·20 claims
- 0585US8779698B2Automatic variable speed motor drive bypassHAVARD HAROLD GENE·Filed 2011·Granted Jul 15, 2014·15 cites·18 claims
- 0683US12158282B2Variable refrigerant flow systemLENNOX IND INC·Filed 2023·Granted Dec 3, 2024·0 cites·16 claims
- 0779US12000632B2Controlling metering devicesLENNOX IND INC·Filed 2022·Granted Jun 4, 2024·0 cites·5 claims
- 0879US11384987B2Cooling systemLENNOX IND INC·Filed 2019·Granted Jul 12, 2022·1 cites·13 claims
- 0977US11573038B2Methods and systems for operating HVAC systems in low load conditionsLENNOX IND INC·Filed 2021·Granted Feb 7, 2023·0 cites·20 claims
- 1077US10365025B2Methods and systems for operating HVAC systems in low load conditionsLENNOX IND INC·Filed 2015·Granted Jul 30, 2019·1 cites·7 claims
- 1176US10047965B2System for managing lubricant levels in tandem compressor assemblies of an HVAC systemLENNOX IND INC·Filed 2015·Granted Aug 14, 2018·2 cites·16 claims
- 1275US11828486B2Variable refrigerant flow system with reheating of dehumidified airLENNOX IND INC·Filed 2021·Granted Nov 28, 2023·0 cites·17 claims
- 1375US11255553B2Variable refrigerant flow system with reheating of dehumidified airLENNOX IND INC·Filed 2019·Granted Feb 22, 2022·1 cites·16 claims
- 1475US9581371B2System for operating an HVAC system having tandem compressorsLENNOX IND INC·Filed 2014·Granted Feb 28, 2017·2 cites·19 claims
- 1574US11493250B2Methods and systems for operating HVAC systems in low load conditionsLENNOX IND INC·Filed 2021·Granted Nov 8, 2022·0 cites·20 claims
- 1673US11885570B2Cooling systemLENNOX IND INC·Filed 2022·Granted Jan 30, 2024·0 cites·7 claims
- 1773US9692347B2Airflow-confirming HVAC systems and methods with variable speed blowerLENNOX IND INC·Filed 2014·Granted Jun 27, 2017·3 cites·14 claims
- 1867US10197304B2Tandem compressor discharge pressure and temperature control logicLENNOX IND INC·Filed 2015·Granted Feb 5, 2019·1 cites·20 claims
- 1965US9677797B2Inverter controller, method of operation thereof and field-installable retrofit kit incorporating the sameHAVARD JR HAROLD GENE·Filed 2011·Granted Jun 13, 2017·2 cites·20 claims
- 2064US11092368B2Methods and systems for operating HVAC systems in low load conditionsLENNOX IND INC·Filed 2019·Granted Aug 17, 2021·0 cites·9 claims
- 2160US10156396B2System for operating an HVAC system having tandem compressorsLENNOX IND INC·Filed 2017·Granted Dec 18, 2018·0 cites·18 claims
- 2259US11512882B2Controlling metering devicesLENNOX IND INC·Filed 2020·Granted Nov 29, 2022·0 cites·6 claims
- 2358US9989288B2System for managing lubricant levels in tandem compressor assemblies of an HVAC systemLENNOX IND INC·Filed 2016·Granted Jun 5, 2018·0 cites·20 claims
- 2456US9927135B2Charge management for air conditioningLENNOX IND INC·Filed 2016·Granted Mar 27, 2018·0 cites·15 claims
- 2554US2015121908A1Pressure regulation of an air conditioning systemLENNOX IND INC·Filed 2015·Application pending·0 cites
- 2651US10337777B2Controlling air conditioning systemsPEREZ ERIC·Filed 2012·Granted Jul 2, 2019·0 cites·11 claims
- 2751US9759468B2System for controlling operation of an HVAC system having tandem compressorsLENNOX IND INC·Filed 2014·Granted Sep 12, 2017·0 cites·18 claims
- 2849US11397040B2Control scheme for automatic fan mode for use with variable refrigerant flow systemsLENNOX IND INC·Filed 2019·Granted Jul 26, 2022·0 cites·20 claims
- 2945US10690386B2Controlling metering devicesPEREZ ERIC·Filed 2012·Granted Jun 23, 2020·0 cites·6 claims
- 3044US2012060523A1Evaporator coil staging and control for a multi-staged space conditioning systemHUNG DER-KAI·Filed 2010·Application pending·0 cites
- 3139US2017030621A1Low ambient cooling scheme and controlLENNOX IND INC·Filed 2015·Application pending·0 cites
- 3237US10337780B2Variable refrigerant flow system operation in low ambient conditionsLENNOX IND INC·Filed 2015·Granted Jul 2, 2019·0 cites·16 claims
- 3336US2017102175A1System and Method to Eliminate High Pressure Surges in HVAC SystemsLENNOX IND INC·Filed 2015·Application pending·0 cites
- 3436US2017102174A1Methods to Eliminate High Pressure Surges in HVAC SystemsLENNOX IND INC·Filed 2015·Application pending·0 cites
Join the waitlist — get patent alerts
Get an alert when Der-Kai Hung files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →