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Class Information
Number: 73/204.25
Name: Measuring and testing > Volume or rate of flow > Thermal type > Having particular electrical heating, cooling, or thermal sensing element > Resistive element
Description: Subject matter wherein the sensor or heater is an electrical resistance element.










Sub-classes under this class:

Class Number Class Name Patents
73/204.27 Wire type (e.g., hot wire) 120
73/204.26 With substrate carrier (e.g., thin film) 438


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8356623 Mass flow meter and mass flow controller Jan. 22, 2013
8336376 Thermal flow meter Dec. 25, 2012
8287082 Method of detecting discharging state of inkjet recording head Oct. 16, 2012
8166814 Flow sensor and manufacturing method therefor May. 1, 2012
8061194 Fluid flow monitoring Nov. 22, 2011
7882735 Thermal air flowmeter Feb. 8, 2011
7861585 Flowmeter Jan. 4, 2011
7793410 Method of making a plurality of flow sensors Sep. 14, 2010
7765679 Method of manufacturing a flow rate sensor Aug. 3, 2010
7726186 Airflow sensor for filter blockage detection Jun. 1, 2010
7661877 Thermal flow detecting apparatus and method for detecting flow using the same Feb. 16, 2010
7653503 Temperature-compensating sensor system Jan. 26, 2010
7640768 Heating/cooling system for indwelling heat exchange catheter Jan. 5, 2010
7528737 Temperature responsive indicators for process control instruments May. 5, 2009
7481574 Thermal flow rate sensor supplying digital output Jan. 27, 2009
7469583 Flow sensor Dec. 30, 2008
7418859 Device for measuring a volume flow with inductive coupling Sep. 2, 2008
7408133 Method of thermally coupling a flow tube or like component to a thermal sensor and sensor systems formed thereby Aug. 5, 2008
7347092 Apparatus and method for fluid flow measurement Mar. 25, 2008
7281423 Characteristics adjusting apparatus of physical quantity sensing device and a thermal type air flow measuring instrument, and associated adjusting method Oct. 16, 2007
7215021 Electronic device May. 8, 2007
7213455 Thermal type gas flow measuring instrument May. 8, 2007
7210194 Airflow sensor system for monitoring air inlet airflow and air outlet airflow of a vacuum cleaner May. 1, 2007
7205781 Mass air flow circuit having pulse width modulation feedback control Apr. 17, 2007
7201049 Pulsed thermistor sensor Apr. 10, 2007
7162374 Device for the determination of flow parameters for a fluid and method for operating such a device Jan. 9, 2007
7120542 Flow monitoring system Oct. 10, 2006
7084778 Ammonia flow alarm and method therefor Aug. 1, 2006
7084378 Mass-flow sensor heating element protection method and apparatus Aug. 1, 2006
7036368 Heating resistor type air flow rate measuring apparatus May. 2, 2006
6983653 Flow sensor having thin film portion and method for manufacturing the same Jan. 10, 2006
6911894 Sensor package for harsh environments Jun. 28, 2005
6886402 Gas flow rate and temperature measuring element May. 3, 2005
6794981 Integratable-fluid flow and property microsensor assembly Sep. 21, 2004
6732583 Sensor element and its manufacturing method May. 11, 2004
6725166 Flow pickup circuit Apr. 20, 2004
6701781 Mass air flow sensor bypass housing Mar. 9, 2004
6639506 Method and apparatus for sensing and measuring plural physical properties, including temperature Oct. 28, 2003
6628202 Thermal dispersion mass flow rate and liquid level switch/transmitter Sep. 30, 2003
6595049 Thermal mass flow sensor with improved sensitivity and response time Jul. 22, 2003
6450024 Flow sensing device Sep. 17, 2002
6435023 Heating resistor type air flow rate measuring apparatus Aug. 20, 2002
6230560 Flow measuring device and flow measuring method May. 15, 2001
6230559 Thermal type flow measuring instrument and temperature-error correcting apparatus thereof May. 15, 2001
6227045 Groundwater flow measuring system May. 8, 2001
6208254 Thermal dispersion mass flow rate and liquid level switch/transmitter Mar. 27, 2001
6184773 Rugged fluid flow and property microsensor Feb. 6, 2001
6153861 Heating element for lambda sensors Nov. 28, 2000
6094982 Flow measuring device and flow measuring method Aug. 1, 2000
6085588 Flow rate sensor Jul. 11, 2000

1 2 3










 
 
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