David L. Haessig

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Poway, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Methods to monitor air filter life in fan motor controller and appa...
- Patent number 12,181,166
- Issue date Dec 31, 2024
- Evolution Controls Inc.
- David Lee Haessig
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Electronic proof of air flow switch
- Patent number 12,099,074
- Issue date Sep 24, 2024
- Evolution Controls Inc.
- David Lee Haessig
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
HVAC motor control local display and adjustment methods and apparat...
- Patent number 12,025,329
- Issue date Jul 2, 2024
- Evolution Controls Inc.
- David Lee Haessig
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Dynamically controlled environmental control system
- Patent number 5,344,068
- Issue date Sep 6, 1994
- Staefa Control System, Inc.
- David L. Haessig
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Variable air volume ventilating system and method of operating same
- Patent number 5,005,636
- Issue date Apr 9, 1991
- Staefa Control System, Inc.
- David L. Haessig
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Forced air ventilation system
- Patent number 4,942,921
- Issue date Jul 24, 1990
- Staefa Control Systems, Inc.
- David L. Haessig
- F24 - HEATING RANGES VENTILATING

Patents Applicationslast 30 patents

Information Patent Application
Apparatus and Method for Modulating Forced Air Electric Heater Cont...
- Publication number 20230266040
- Publication date Aug 24, 2023
- Evolution Controls Inc.
- David Lee Haessig
- F24 - HEATING RANGES VENTILATING
Information Patent Application
Methods to Monitor Air Filter Life in Fan Motor Controller and Appa...
- Publication number 20220341614
- Publication date Oct 27, 2022
- Evolution Controls Inc.
- David Lee Haessig
- F24 - HEATING RANGES VENTILATING
Information Patent Application
HVAC Motor Automation Control Unit and Adjustment Methods and Appar...
- Publication number 20220228768
- Publication date Jul 21, 2022
- Evolution Controls Inc.
- David Lee Haessig
- G05 - CONTROLLING REGULATING
Information Patent Application
HVAC Motor Control Local Display and Adjustment Methods and Apparat...
- Publication number 20220186964
- Publication date Jun 16, 2022
- Evolution Controls Inc.
- David Lee Haessig
- F24 - HEATING RANGES VENTILATING
Information Patent Application
Electronic Proof of Air Flow Switch
- Publication number 20220043021
- Publication date Feb 10, 2022
- Evolution Controls Inc.
- David Lee Haessig
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Automated Adjustment HVAC Motor Controller Call Interface and Metho...
- Publication number 20220026094
- Publication date Jan 27, 2022
- Evolution Controls, Inc.
- David Lee Haessig
- F24 - HEATING RANGES VENTILATING