P

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 patents
US11187148B1Nov 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 patents

ROSEMOUNT AEROSPACE INC

2 patents

OTIS ELEVATOR CO

2 patents

RAYTHEON TECH CORP

1 patent

ROCKWELL COLLINS INC

1 patent