Inventor
DOUGLAS JONATHAN D
US35 patents
⚠️ This page may combine multiple inventors who share the name “DOUGLAS JONATHAN D”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
TYCO FIRE & SECURITY GMBH
15 patentsUS12584648B2Mar 24, 2026
Building management system with clean air and infection reduction features
TYCO FIRE & SECURITY GMBH0 citations62
US12578109B2Mar 17, 2026
Systems and methods to mitigate infection risk using air purification
TYCO FIRE & SECURITY GMBH0 citations62
US12546499B2Feb 10, 2026
Building management system with clean air and infection reduction features
TYCO FIRE & SECURITY GMBH0 citations62
US12437627B2Oct 7, 2025
Systems and methods for on-site pathogen detection
TYCO FIRE & SECURITY GMBH0 citations62
US12372934B2Jul 29, 2025
Building HVAC system with multi-objective optimization control
TYCO FIRE & SECURITY GMBH0 citations62
US12222124B2Feb 11, 2025
HVAC system design and operational tool for building infection control
TYCO FIRE & SECURITY GMBH0 citations62
US12590721B2Mar 31, 2026
Building management system with particulate sensing
TYCO FIRE & SECURITY GMBH0 citations59
US12578110B2Mar 17, 2026
Building management system with particulate sensing
TYCO FIRE & SECURITY GMBH0 citations59
US12044424B2Jul 23, 2024
Variable air volume systems with filtration and air quality control
TYCO FIRE & SECURITY GMBH0 citations59
US12578117B2Mar 17, 2026
Building HVAC system with sample collection
TYCO FIRE & SECURITY GMBH0 citations52
US12529490B2Jan 20, 2026
Infection control tool for HVAC system
TYCO FIRE & SECURITY GMBH0 citations52
US12412003B2Sep 9, 2025
Building data platform with digital twin based predictive recommendation visualization
TYCO FIRE & SECURITY GMBH0 citations52
US12398908B2Aug 26, 2025
Building data platform with air quality analysis based on mobile air quality sensors
TYCO FIRE & SECURITY GMBH0 citations52
US12571553B2Mar 10, 2026
Building air quality assessment
TYCO FIRE & SECURITY GMBH0 citations50
US12265366B1Apr 1, 2025
Building system with synthetic data compliance control
TYCO FIRE & SECURITY GMBH0 citations48
Johnson Controls Tyco IP Holdings LLP
7 patentsUS11885510B2Jan 30, 2024
Systems and methods to mitigate infection risk using air purification
Johnson Controls Tyco IP Holdings LLP2 citations73
US11747037B2Sep 5, 2023
Building system with an in-zone plume control system
Johnson Controls Tyco IP Holdings LLP2 citations73
US12007732B2Jun 11, 2024
HVAC system with building infection control
Johnson Controls Tyco IP Holdings LLP1 citations62
US11960261B2Apr 16, 2024
HVAC system with sustainability and emissions controls
Johnson Controls Tyco IP Holdings LLP0 citations62
US12174601B2Dec 24, 2024
Building system with occupant health analysis based on water usage
Johnson Controls Tyco IP Holdings LLP1 citations61
US12264828B2Apr 1, 2025
Air quality control and disinfection system
Johnson Controls Tyco IP Holdings LLP1 citations59
US12571554B2Mar 10, 2026
Building management system with clean air features
Johnson Controls Tyco IP Holdings LLP0 citations46
FIELD DIAGNOSTIC SERVICES INC
4 patentsUS6973793B2Dec 13, 2005
Estimating evaporator airflow in vapor compression cycle cooling equipment
FIELD DIAGNOSTIC SERVICES INC121 citations95
US6701725B2Mar 9, 2004
Estimating operating parameters of vapor compression cycle equipment
FIELD DIAGNOSTIC SERVICES INC99 citations95
US6658373B2Dec 2, 2003
Apparatus and method for detecting faults and providing diagnostics in vapor compression cycle equipment
FIELD DIAGNOSTIC SERVICES INC189 citations95
US7079967B2Jul 18, 2006
Apparatus and method for detecting faults and providing diagnostics in vapor compression cycle equipment
FIELD DIAGNOSTIC SERVICES INC110 citations94
DOUGLAS JONATHAN D
4 patentsUS8417386B2Apr 9, 2013
System and method for defrost of an HVAC system
DOUGLAS JONATHAN D14 citations80
US8113789B2Feb 14, 2012
System and method of disabling an HVAC compressor based on a high pressure cut out
DOUGLAS JONATHAN D7 citations80
US8151585B2Apr 10, 2012
System and method of disabling an HVAC compressor based on a low pressure cut out
DOUGLAS JONATHAN D6 citations69
US8327658B2Dec 11, 2012
System and method for oil return in an HVAC system
DOUGLAS JONATHAN D3 citations57