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Inventor

Robert W. Helt

Inventor
Tyler, TX, US

Overview

30→
Patents
1981–2017
Patent span
Mechanical engineering
Primary field (CPC F)

Patents· 30 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

F24Fprimary
F24FAir-conditioning27%
Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications17%
F25BRefrigeration machines, plants or systems8%
G05DSystems for controlling or regulating non-electric variables8%
F24HFluid heaters, e.g. water or air heaters, having heat-generating means, e.g. heat pumps, in general7%
F23NRegulating or controlling combustion5%
F24DDomestic- or space-heating systems, e.g. central heating systems5%
B03CMagnetic or electrostatic separation of solid materials from solid materials or fluids3%
F25DRefrigerators3%
F04DNon-positive-displacement pumps2%
PatentTitleYear
9,601,919'Time delay with control voltage sensing'20179,228,757'Heater interlock control for air conditioning system'20169,115,907'Ventilation controller'20158,961,282'Ventilation controller'20158,746,584'Heater interlock control for air conditioning system'20148,702,482'Ventilation controller'20148,695,887'Temperature compensation method for thermostats'20148,117,862'Device and method for recording air conditioning system information'20127,975,494'Control system interface with display for air conditioning apparatus'20117,837,128'Multiple thermostats for air conditioning system with time setting feature'20107,640,761'System and method for controlling indoor air flow for heating, ventilating and air conditioning equipment'20107,600,694'Multiple thermostats for air conditioning system with time setting feature'20097,434,741'Automatic damper control for air conditioning system humidifier'20087,380,588'Heat pump control system and method of operating to provide automatic backup heating modes'20087,351,274'Air filtration system control'20087,228,693'Controlling airflow in an air conditioning system for control of system discharge temperature and humidity'2007D0533091'Heating, ventilating and air conditioning controller'20066,647,203'Air handler power distribution system'20036,377,426'Gas furnace with variable speed draft inducer'20026,282,910'Indoor blower variable speed drive for reduced airflow'20016,257,870'Gas furnace with variable speed draft inducer'20016,247,921'Apparatus for generating a spark'20016,066,194'Electronic room air cleaner with variable speed motor'20005,271,556'Integrated furnace control'19934,856,286'Refrigeration compressor driven by a DC motor'19894,850,198'Time based cooling below set point temperature'19894,720,981'Cooling of air conditioning control electronics'19884,687,948'Dual mode controller for assigning operating priority of two loads'19874,573,326'Adaptive defrost control for heat pump system'19864,261,418'Outdoor coil unit for heat pump'1981

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1981Based in Oklahoma City, OK, US· patent location history
1986–2003Patents assigned to AMERICAN STANDARD INC (8)· patent assignee history
1986–2014Based in Tyler, TX, US· patent location history
2001–2008Patents assigned to AMERICAN STANDARD INT INC (7)· patent assignee history
2008–2017Patents assigned to TRANE INT INC (14)· patent assignee history
2010Based in Portland, ME, US· patent location history
2012–2017Patents assigned to HELT ROBERT W (5)· patent assignee history
2014Patents assigned to CRAWFORD ROY R (1)· patent assignee history
2015–2017Based in Westborough, MA, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
TRANE INT INC142008–2017
AMERICAN STANDARD INC81986–2003
AMERICAN STANDARD INT INC72001–2008
HELT ROBERT Wself52012–2017
CRAWFORD ROY R12014
Locations
LocationPatentsSpan
Tyler, Texas, US241986–2014
Westborough, Massachusetts, US42015–2017
Portland, ME, US12010
Oklahoma City, OK, US11981