Inventor
HELD TIMOTHY J
US14 patents
⚠️ This page may combine multiple inventors who share the name “HELD TIMOTHY J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HELD TIMOTHY J
5 patentsUS8281593B2Oct 9, 2012
Heat engine and heat to electricity systems and methods with working fluid fill system
HELD TIMOTHY J66 citations97
US8613195B2Dec 24, 2013
Heat engine and heat to electricity systems and methods with working fluid mass management control
HELD TIMOTHY J95 citations96
US8096128B2Jan 17, 2012
Heat engine and heat to electricity systems and methods
HELD TIMOTHY J103 citations96
US8794002B2Aug 5, 2014
Thermal energy conversion method
HELD TIMOTHY J22 citations90
US9115605B2Aug 25, 2015
Thermal energy conversion device
HELD TIMOTHY J7 citations82
ECHOGEN POWER SYSTEMS LLC
3 patentsUS9932861B2Apr 3, 2018
Systems and methods for controlling backpressure in a heat engine system having hydrostaic bearings
ECHOGEN POWER SYSTEMS LLC66 citations94
US10495098B2Dec 3, 2019
Systems and methods for balancing thrust loads in a heat engine system
ECHOGEN POWER SYSTEMS LLC52 citations91
US11435120B2Sep 6, 2022
Split expansion heat pump cycle
ECHOGEN POWER SYSTEMS LLC0 citations52
SUPERCRITICAL STORAGE COMPANY INC
3 patentsUS11629638B2Apr 18, 2023
Three reservoir electric thermal energy storage system
SUPERCRITICAL STORAGE COMPANY INC0 citations58
US12331664B2Jun 17, 2025
Waste heat integration into pumped thermal energy storage
SUPERCRITICAL STORAGE COMPANY INC0 citations52
US12516855B2Jan 6, 2026
High-temperature, dual rail heat pump cycle for high performance at high-temperature lift and range
SUPERCRITICAL STORAGE COMPANY INC0 citations47