Inventor
SPIERLING TODD A
US36 patents
⚠️ This page may combine multiple inventors who share the name “SPIERLING TODD A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HAMILTON SUNDSTRAND CORP
24 patentsUS9917490B2Mar 13, 2018
Tail cone generator with integral speed increasing gearbox
HAMILTON SUNDSTRAND CORP37 citations93
US11242156B2Feb 8, 2022
Plug in fluid cooled electrical connections for tail cone mounted generator
HAMILTON SUNDSTRAND CORP15 citations86
US11162379B2Nov 2, 2021
Temperature control device for tail cone mounted generator
HAMILTON SUNDSTRAND CORP14 citations86
US8662445B2Mar 4, 2014
Hybrid power system architecture for an aircraft
HAMILTON SUNDSTRAND CORP9 citations84
US11802489B1Oct 31, 2023
Energy harvesting for hybrid propulsion systems
HAMILTON SUNDSTRAND CORP3 citations73
US11060449B2Jul 13, 2021
Integrated turbo-compressor with variable gear ratio transmission for internal combustion engine
HAMILTON SUNDSTRAND CORP3 citations73
US10850860B1Dec 1, 2020
Internal combustion engines with unidirectional compounding drives
HAMILTON SUNDSTRAND CORP2 citations73
US10309303B2Jun 4, 2019
Systems and methods of generating electrical power
HAMILTON SUNDSTRAND CORP5 citations72
US11999473B2Jun 4, 2024
Self-orienting pods
HAMILTON SUNDSTRAND CORP0 citations62
US11649064B2May 16, 2023
Integrated motor drive cooling
HAMILTON SUNDSTRAND CORP1 citations62
US11319895B2May 3, 2022
Integrated tail cone and mounted generator
HAMILTON SUNDSTRAND CORP1 citations62
US11070118B2Jul 20, 2021
Electrical machine disconnection systems
HAMILTON SUNDSTRAND CORP0 citations62
US12451769B2Oct 21, 2025
Multiplexed bi directional converters for hybrid electric aircraft propulsion
HAMILTON SUNDSTRAND CORP0 citations60
US11434778B2Sep 6, 2022
Integrated tail cone and mounted generator acoustic suppression
HAMILTON SUNDSTRAND CORP0 citations52
US11312222B2Apr 26, 2022
Series hybrid architectures using compounded doubly fed machines
HAMILTON SUNDSTRAND CORP0 citations52
US11018553B2May 25, 2021
Electrical machine disconnection systems
HAMILTON SUNDSTRAND CORP0 citations52
US10293946B2May 21, 2019
Hybrid electric
HAMILTON SUNDSTRAND CORP0 citations52
US9325269B1Apr 26, 2016
Two stage flux switching machine for an electrical power generation system
HAMILTON SUNDSTRAND CORP0 citations52
US10027210B2Jul 17, 2018
Dual-output generators
HAMILTON SUNDSTRAND CORP1 citations51
US12003132B2Jun 4, 2024
Hybrid electric secondary power and battery charging architecture and control system
HAMILTON SUNDSTRAND CORP0 citations50
US12519377B2Jan 6, 2026
Mechanically switchable electric machines for electrified propulsion
HAMILTON SUNDSTRAND CORP0 citations49
US12535014B2Jan 27, 2026
Vortex turbines for a hybrid-electric aircraft
HAMILTON SUNDSTRAND CORP0 citations46
US10879779B2Dec 29, 2020
Electrical machine disconnection systems
HAMILTON SUNDSTRAND CORP0 citations42
US10800246B2Oct 13, 2020
Hybrid electric propulsion power supply
HAMILTON SUNDSTRAND CORP0 citations42
PRATT & WHITNEY CANADA
6 patentsUS11732639B2Aug 22, 2023
Mechanical disconnects for parallel power lanes in hybrid electric propulsion systems
PRATT & WHITNEY CANADA9 citations84
US11667391B2Jun 6, 2023
Dual engine hybrid-electric aircraft
PRATT & WHITNEY CANADA3 citations73
US12319400B2Jun 3, 2025
Aircraft propulsion system and methods of feathering
PRATT & WHITNEY CANADA0 citations61
US11926426B2Mar 12, 2024
Electric distributed propulsion using exhaust recovery power
PRATT & WHITNEY CANADA0 citations52
US11912422B2Feb 27, 2024
Hybrid electric aircraft and powerplant arrangements
PRATT & WHITNEY CANADA0 citations52
US12583608B2Mar 24, 2026
Electric motor propulsion system for an aircraft
PRATT & WHITNEY CANADA0 citations51