Inventor · disambiguated record
Jonathan D. Douglas
Also filed as: DOUGLAS JONATHAN · DOUGLAS JONATHAN D · DOUGLAS JONATHAN DAVID
50 granted patents·32 pending applications·844 citations·filing 1998–2025
98Inventor score
Files withJohnson Controls Tyco IP Holdings LLP20TYCO FIRE & SECURITY GMBH17LENNOX IND INC10HEATCRAFT REFRIGERATION PRODUCTS LLC8DOUGLAS JONATHAN D4
Top patents by PatentIndex Score
82 records- 0198US11269306B2HVAC system with building infection controlJOHNSON CONTROLS TECH CO·Filed 2020·Granted Mar 8, 2022·16 cites·19 claims
- 0298US11131473B2HVAC system design and operational tool for building infection controlJOHNSON CONTROLS TECH CO·Filed 2020·Granted Sep 28, 2021·36 cites·21 claims
- 0395US6973793B2Estimating evaporator airflow in vapor compression cycle cooling equipmentFIELD DIAGNOSTIC SERVICES INC·Filed 2003·Granted Dec 13, 2005·121 cites·14 claims
- 0495US6079481AThermal storage systemAIL RES INC·Filed 1998·Granted Jun 27, 2000·80 cites·23 claims
- 0594US11885510B2Systems and methods to mitigate infection risk using air purificationJohnson Controls Tyco IP Holdings LLP·Filed 2021·Granted Jan 30, 2024·2 cites·20 claims
- 0694US11747037B2Building system with an in-zone plume control systemJohnson Controls Tyco IP Holdings LLP·Filed 2021·Granted Sep 5, 2023·2 cites·20 claims
- 0794US11536476B2Building system with flexible facility operationJohnson Controls Tyco IP Holdings LLP·Filed 2020·Granted Dec 27, 2022·7 cites·27 claims
- 0894US6658373B2Apparatus and method for detecting faults and providing diagnostics in vapor compression cycle equipmentFIELD DIAGNOSTIC SERVICES INC·Filed 2001·Granted Dec 2, 2003·189 cites·2 claims
- 0993US10323870B2Optimizing liquid temperature and liquid pressure in a modular outdoor refrigeration systemHEATCRAFT REFRIGERATION PRODUCTS LLC·Filed 2016·Granted Jun 18, 2019·5 cites·7 claims
- 1093US7079967B2Apparatus and method for detecting faults and providing diagnostics in vapor compression cycle equipmentFIELD DIAGNOSTIC SERVICES INC·Filed 2003·Granted Jul 18, 2006·110 cites·3 claims
- 1193US6701725B2Estimating operating parameters of vapor compression cycle equipmentFIELD DIAGNOSTIC SERVICES INC·Filed 2002·Granted Mar 9, 2004·99 cites·15 claims
- 1291US12379128B2Energy efficient heat pump systems and methodsTYCO FIRE & SECURITY GMBH·Filed 2024·Granted Aug 5, 2025·1 cites·19 claims
- 1390US9568227B2Systems and methods for refrigerant charge detectionLENNOX IND INC·Filed 2014·Granted Feb 14, 2017·7 cites·8 claims
- 1489US2025129960A1Hvac system design and operational tool for building infection controlTYCO FIRE & SECURITY GMBH·Filed 2024·Application pending·0 cites
- 1588US12174601B2Building system with occupant health analysis based on water usageJohnson Controls Tyco IP Holdings LLP·Filed 2021·Granted Dec 24, 2024·1 cites·20 claims
- 1688US8151583B2Expansion valve control system and method for air conditioning apparatusDOUGLAS JONATHAN DAVID·Filed 2007·Granted Apr 10, 2012·16 cites·24 claims
- 1787US7377206B2Piston for an internal combustion engineMAHLE TECHNOLOGY INC·Filed 2005·Granted May 27, 2008·7 cites·10 claims
- 1886US12007732B2HVAC system with building infection controlJohnson Controls Tyco IP Holdings LLP·Filed 2021·Granted Jun 11, 2024·1 cites·15 claims
- 1986US9874362B2Systems and methods for ventilating a buildingLENNOX IND INC·Filed 2013·Granted Jan 23, 2018·10 cites·10 claims
- 2085US9810462B2Dehumidification using intermittent ventilationLENNOX IND INC·Filed 2013·Granted Nov 7, 2017·9 cites·11 claims
- 2185US8915295B2Method of adaptive control of a bypass damper in a zoned HVAC systemNORRELL BILLY W·Filed 2011·Granted Dec 23, 2014·15 cites·11 claims
- 2283US12372934B2Building HVAC system with multi-objective optimization controlTYCO FIRE & SECURITY GMBH·Filed 2024·Granted Jul 29, 2025·0 cites·20 claims
- 2381US10247434B2HVAC system and an HVAC controller configured to operate the HVAC system based on air pollutant data and user comfortLENNOX IND INC·Filed 2016·Granted Apr 2, 2019·3 cites·21 claims
- 2481US10061330B2HVAC system having a diagnostics controller associated therewithLENNOX IND INC·Filed 2013·Granted Aug 28, 2018·8 cites·9 claims
- 2580US8887518B2Expansion valve control system and method for air conditioning apparatusMERCER KEVIN B·Filed 2010·Granted Nov 18, 2014·6 cites·8 claims
- 2680US8417386B2System and method for defrost of an HVAC systemDOUGLAS JONATHAN D·Filed 2008·Granted Apr 9, 2013·14 cites·19 claims
- 2779US12264828B2Air quality control and disinfection systemJohnson Controls Tyco IP Holdings LLP·Filed 2020·Granted Apr 1, 2025·1 cites·17 claims
- 2879US8113789B2System and method of disabling an HVAC compressor based on a high pressure cut outDOUGLAS JONATHAN D·Filed 2008·Granted Feb 14, 2012·7 cites·27 claims
- 2978US7866172B2System and method for controlling working fluid charge in a vapor compression air conditioning systemTRANE INT INC·Filed 2006·Granted Jan 11, 2011·9 cites·16 claims
- 3078US7046663B1System and method for intercepting packets in a pipeline network processorCISCO TECH INC·Filed 2001·Granted May 16, 2006·34 cites·21 claims
- 3177US12222124B2HVAC system design and operational tool for building infection controlTYCO FIRE & SECURITY GMBH·Filed 2021·Granted Feb 11, 2025·0 cites·20 claims
- 3277US8151585B2System and method of disabling an HVAC compressor based on a low pressure cut outDOUGLAS JONATHAN D·Filed 2008·Granted Apr 10, 2012·6 cites·30 claims
- 3375US11906188B2Energy efficient heat pump systems and methodsJohnson Controls Tyco IP Holdings LLP·Filed 2023·Granted Feb 20, 2024·0 cites·20 claims
- 3473US12265366B1Building system with synthetic data compliance controlTYCO FIRE & SECURITY GMBH·Filed 2023·Granted Apr 1, 2025·0 cites·20 claims
- 3572US11960261B2HVAC system with sustainability and emissions controlsJohnson Controls Tyco IP Holdings LLP·Filed 2021·Granted Apr 16, 2024·0 cites·16 claims
- 3668US11248828B2Optimizing liquid temperature and liquid pressure in a modular outdoor refrigeration systemHEATCRAFT REFRIGERATION PRODUCTS LLC·Filed 2019·Granted Feb 15, 2022·0 cites·13 claims
- 3768US8116911B2System and method for sump heater control in an HVAC systemBAILEY JOHN J·Filed 2008·Granted Feb 14, 2012·7 cites·23 claims
- 3868US2025181047A1Building system with synthetic data compliance controlTYCO FIRE & SECURITY GMBH·Filed 2025·Application pending·0 cites
- 3967US2025108323A1Hvac system with air filtration estimation and controlTYCO FIRE & SECURITY GMBH·Filed 2024·Application pending·0 cites
- 4066US8327658B2System and method for oil return in an HVAC systemDOUGLAS JONATHAN D·Filed 2008·Granted Dec 11, 2012·3 cites·9 claims
- 4166US2023335272A1Building management system with water and air-based biological sensingJohnson Controls Tyco IP Holdings LLP·Filed 2023·Application pending·0 cites
- 4265US12398908B2Building data platform with air quality analysis based on mobile air quality sensorsTYCO FIRE & SECURITY GMBH·Filed 2022·Granted Aug 26, 2025·0 cites·20 claims
- 4365US12044424B2Variable air volume systems with filtration and air quality controlTYCO FIRE & SECURITY GMBH·Filed 2021·Granted Jul 23, 2024·0 cites·43 claims
- 4465US9689585B2Method of adaptive control of a bypass damper in a zoned HVAC systemTRANE INT INC·Filed 2014·Granted Jun 27, 2017·1 cites·15 claims
- 4564US2024318845A1Systems and methods for feedback control of disinfectionTYCO FIRE & SECURITY GMBH·Filed 2024·Application pending·0 cites
- 4664US2024426500A1Building management system with infection modes operating using compliance standardsTYCO FIRE & SECURITY GMBH·Filed 2024·Application pending·0 cites
- 4763US2024200816A1Building management system with continuous air quality monitoringJohnson Controls Tyco IP Holdings LLP·Filed 2023·Application pending·0 cites
- 4862US12412003B2Building data platform with digital twin based predictive recommendation visualizationTYCO FIRE & SECURITY GMBH·Filed 2022·Granted Sep 9, 2025·0 cites·24 claims
- 4962US2024207468A1Systems and methods to mitigate infection risk using far uv-cJohnson Controls Tyco IP Holdings LLP·Filed 2023·Application pending·0 cites
- 5061USD800282SHeat exchanger finLENNOX IND INC·Filed 2016·Granted Oct 17, 2017·9 cites·1 claims
Showing the top 50 of 82 patent records by PatentIndex Score.
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