Inventor
RANJAN RAM
US48 patents
⚠️ This page may combine multiple inventors who share the name “RANJAN RAM”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HAMILTON SUNDSTRAND CORP
39 patentsUS11187148B1Nov 30, 2021
Power and cooling unit (PCU)
HAMILTON SUNDSTRAND CORP11 citations84
US11085700B2Aug 10, 2021
Branching heat exchangers
HAMILTON SUNDSTRAND CORP8 citations84
US11493286B1Nov 8, 2022
Header for high-pressure heat exchanger
HAMILTON SUNDSTRAND CORP10 citations83
US9220184B2Dec 22, 2015
Advanced cooling for power module switches
HAMILTON SUNDSTRAND CORP16 citations83
US11731780B2Aug 22, 2023
Aircraft system including a cryogenic fluid operated auxiliary power unit (APU)
HAMILTON SUNDSTRAND CORP6 citations75
US11629637B2Apr 18, 2023
Supercritical carbon dioxide-cooled generator and turbine
HAMILTON SUNDSTRAND CORP4 citations74
US11333438B2May 17, 2022
Heat exchanger with water extraction
HAMILTON SUNDSTRAND CORP3 citations73
US11045912B2Jun 29, 2021
Method of fabricating an oscillating heat pipe
HAMILTON SUNDSTRAND CORP5 citations73
US10995997B2May 4, 2021
Heat exchanger with integral features
HAMILTON SUNDSTRAND CORP5 citations73
US10845135B2Nov 24, 2020
Inlet header duct design features
HAMILTON SUNDSTRAND CORP3 citations73
US12084194B2Sep 10, 2024
Fuel storage leak mitigation for aircraft
HAMILTON SUNDSTRAND CORP2 citations72
US11536164B1Dec 27, 2022
Closed-loop brayton cycle system with turbine blade cooling
HAMILTON SUNDSTRAND CORP2 citations72
US11112183B2Sep 7, 2021
Heat exchanger channels
HAMILTON SUNDSTRAND CORP3 citations72
US11988418B2May 21, 2024
Vapor compression cycle with direct pumped two-phase cooling
HAMILTON SUNDSTRAND CORP3 citations71
US11542840B2Jan 3, 2023
Hybrid power generation systems
HAMILTON SUNDSTRAND CORP2 citations71
US10415901B2Sep 17, 2019
Counter-flow ceramic heat exchanger assembly and method
HAMILTON SUNDSTRAND CORP5 citations69
US11912416B2Feb 27, 2024
Hydrogen systems for environmental control systems onboard aircraft
HAMILTON SUNDSTRAND CORP2 citations64
US12560386B2Feb 24, 2026
Oscillating heat pipes
HAMILTON SUNDSTRAND CORP0 citations62
US12135036B2Nov 5, 2024
Centerbody insertion for improved CAC motor cooling
HAMILTON SUNDSTRAND CORP0 citations62
US11952910B2Apr 9, 2024
Additively manufactured radial turbine rotor with cooling manifolds
HAMILTON SUNDSTRAND CORP0 citations62
US11680487B2Jun 20, 2023
Additively manufactured radial turbine rotor with cooling manifolds
HAMILTON SUNDSTRAND CORP0 citations62
US11415378B2Aug 16, 2022
Inlet header duct design features
HAMILTON SUNDSTRAND CORP1 citations62
US11371780B2Jun 28, 2022
Heat exchanger with integral features
HAMILTON SUNDSTRAND CORP1 citations62
US10646969B2May 12, 2020
Cross flow ceramic heat exchanger and method for manufacturing
HAMILTON SUNDSTRAND CORP1 citations62
US11965699B2Apr 23, 2024
Heat exchangers
HAMILTON SUNDSTRAND CORP0 citations61
US11243030B2Feb 8, 2022
Heat exchangers
HAMILTON SUNDSTRAND CORP1 citations61
US12130099B2Oct 29, 2024
Header for high-pressure heat exchanger
HAMILTON SUNDSTRAND CORP0 citations60
US12292242B2May 6, 2025
Surface texture enhanced glass-ceramic matrix composite heat exchanger
HAMILTON SUNDSTRAND CORP0 citations59
US12578131B2Mar 17, 2026
Compressor oil recovery in hybrid VCC pumped two phase loops
HAMILTON SUNDSTRAND CORP0 citations58
US12552541B2Feb 17, 2026
Thermal management system for future vertical lift aircraft
HAMILTON SUNDSTRAND CORP0 citations56
US12057609B2Aug 6, 2024
Water recovery system for fuel cells
HAMILTON SUNDSTRAND CORP0 citations52
US11591916B2Feb 28, 2023
Radial turbine rotor with complex cooling channels and method of making same
HAMILTON SUNDSTRAND CORP0 citations52
US11387725B2Jul 12, 2022
Integrated heat dissipative structure for electric machine
HAMILTON SUNDSTRAND CORP0 citations51
US12573649B2Mar 10, 2026
Oxidizing agents for emergency power units
HAMILTON SUNDSTRAND CORP0 citations50
US11876405B2Jan 16, 2024
Electric motor with cooling channels
HAMILTON SUNDSTRAND CORP0 citations50
US12313350B2May 27, 2025
Varying topology heat sinks
HAMILTON SUNDSTRAND CORP0 citations49
US12007180B2Jun 11, 2024
Varying topology heat sinks
HAMILTON SUNDSTRAND CORP0 citations49
US12302541B2May 13, 2025
Stable pumped two-phase cooling
HAMILTON SUNDSTRAND CORP0 citations48
US12063763B2Aug 13, 2024
Cooling in conductors for chips
HAMILTON SUNDSTRAND CORP0 citations43
UNITED TECHNOLOGIES CORP
3 patentsUS10450892B2Oct 22, 2019
Thermal management of turbine casing using varying working mediums
UNITED TECHNOLOGIES CORP3 citations73
US10428660B2Oct 1, 2019
Hybrid airfoil cooling
UNITED TECHNOLOGIES CORP0 citations52
US10392968B2Aug 27, 2019
Turbine casing cooling structure
UNITED TECHNOLOGIES CORP0 citations52