Inventor
BITTNER JOHN D
US20 patents
⚠️ This page may combine multiple inventors who share the name “BITTNER JOHN D”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HILL PHOENIX INC
16 patentsUS9377236B2Jun 28, 2016
CO2 refrigeration system with hot gas defrost
HILL PHOENIX INC25 citations93
US9657977B2May 23, 2017
Cascade refrigeration system with modular ammonia chiller units
HILL PHOENIX INC20 citations90
US7913506B2Mar 29, 2011
Free cooling cascade arrangement for refrigeration system
HILL PHOENIX INC34 citations84
US11397032B2Jul 26, 2022
CO2 refrigeration system with magnetic refrigeration system cooling
HILL PHOENIX INC6 citations83
US8006507B2Aug 30, 2011
System and method for secondary coolant pump control for a refrigeration system
HILL PHOENIX INC7 citations83
US7849701B2Dec 14, 2010
Refrigeration system with a charging loop
HILL PHOENIX INC8 citations83
US9664424B2May 30, 2017
Cascade refrigeration system with modular ammonia chiller units
HILL PHOENIX INC12 citations82
US11029068B2Jun 8, 2021
Systems and methods for pressure control in a CO2 refrigeration system
HILL PHOENIX INC8 citations81
US11287165B2Mar 29, 2022
Refrigeration system with adiabatic electrostatic cooling device
HILL PHOENIX INC5 citations72
US9664420B2May 30, 2017
System and method for using a photovoltaic power source with a secondary coolant refrigeration system
HILL PHOENIX INC3 citations70
US9657973B2May 23, 2017
Refrigeration system with photovoltaic power source
HILL PHOENIX INC2 citations70
US11668499B2Jun 6, 2023
Refrigeration system with adiabatic electrostatic cooling device
HILL PHOENIX INC1 citations62
US12379139B2Aug 5, 2025
CO2 refrigeration system with after-cooling
HILL PHOENIX INC0 citations60
US11940186B2Mar 26, 2024
CO2 refrigeration system with magnetic refrigeration system cooling
HILL PHOENIX INC1 citations60
US11852391B2Dec 26, 2023
Systems and methods for pressure control in a CO2 refrigeration system
HILL PHOENIX INC1 citations59
US12487017B2Dec 2, 2025
CO2 refrigeration system with supercritical subcooling control
HILL PHOENIX INC0 citations51
BITTNER JOHN D
3 patentsUS9151521B2Oct 6, 2015
Free cooling cascade arrangement for refrigeration system
BITTNER JOHN D11 citations82
US8973379B2Mar 10, 2015
Refrigeration control systems and methods for modular compact chiller units
BITTNER JOHN D8 citations76
US8590328B2Nov 26, 2013
Refrigeration system with multi-function heat exchanger
BITTNER JOHN D5 citations63