Controlling a variable-speed heating, ventilation and air-conditioning system using a non-communicating two-stage thermostat
US-2026098652-A1 · Apr 9, 2026 · US
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Leman Derek patents
Leman Derek is listed as an inventor on 16 patents in our database. Major assignees and classification codes are summarized below.
| Metric | Value |
|---|---|
| Inventor | Leman Derek |
| Total patents | 16 |
| First publication | Feb 12, 2015 |
| Latest publication | Apr 9, 2026 |
Notable patents
Publications ranked by popularity score, then publication date.
System and method for controlling operation of a heat pump
US-2026009570-A1 · Jan 8, 2026 · US
Modular de-superheater and water heater system
US-2025198672-A1 · Jun 19, 2025 · US
Heat pump system for optimizing operational efficiencywithout charge imbalance and a method thereof
US-2025075949-A1 · Mar 6, 2025 · US
Method of operating a heat pump system
US-12173942-B2 · Dec 24, 2024 · US
System and method of operating a variable speed compressor with a two-stage controller
US-11022357-B2 · Jun 1, 2021 · US
Refrigerant to water heat exchanger
US-10557667-B2 · Feb 11, 2020 · US
Refrigerant to water heat exchanger
US-2018320979-A1 · Nov 8, 2018 · US
Method for managing a refrigerant charge in a multi-purpose HVAC system
US-10006670-B2 · Jun 26, 2018 · US
Method and system of using a reversing valve to control at least two HVAC systems
US-9732998-B2 · Aug 15, 2017 · US
Recent patents
Latest publications not already listed above.
System and method of operating a variable speed compressor with a two-stage controller
US-2017097183-A1 · Apr 6, 2017 · US
Heat pump water module with condensing coil in water storage tank
US-9488384-B2 · Nov 8, 2016 · US
Method and system of using a reversing valve to control at least two hvac systems
US-2015260437-A1 · Sep 17, 2015 · US
Brazed heat exchanger design
US-2015122459-A1 · May 7, 2015 · US
System and Method for Using an Electronic Expansion Valve to Control a Discharge Pressure in a Multi-Purpose HVAC System
US-2015052914-A1 · Feb 26, 2015 · US
System and method for improving a water heating cycle in a multi-purpose hvac system
US-2015040841-A1 · Feb 12, 2015 · US
Major assignees
Companies most often associated with this inventor's publications.
| Assignee | Patents |
|---|---|
| Carrier Corp | 16 |
| Cluff Charles | 1 |
| Leman Derek | 1 |
Top CPC classifications
Most common classification codes across this inventor's patents.
| CPC | Patents |
|---|---|
| F25B13/00 | 9 |
| F25B2700/2106 | 4 |
| F25B49/02 | 4 |
| F24H4/04 | 4 |
| Y02B30/70 | 3 |