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Class Information
Number: 219/505
Name: Electric heating > Heating devices > With power supply and voltage or current regulation or current control means > Automatic regulating or control means > Comprising variable resistance means > Comprising nonlinear or negative temperature coefficient resistance means
Description: Subject matter wherein the structure includes a nonlinear or negative temperature coefficient of resistance resistor device or devices.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8680435 Electrical heating device Mar. 25, 2014
8653420 Temperature control circuit of oven controlled crystal oscillator Feb. 18, 2014
8653424 Compensation for induction heating in coil welding equipment Feb. 18, 2014
8642931 Adaptive temperature controller Feb. 4, 2014
8637796 Electrical heating device and heat generating element of an electrical heating device Jan. 28, 2014
8614407 Method for supplying current to a glow plug Dec. 24, 2013
8592726 Image heating apparatus and heater used in the apparatus Nov. 26, 2013
8592730 Heater assembly for suture welder Nov. 26, 2013
8569663 Small-sized pool and PTC heater for internal liquid heating Oct. 29, 2013
8563903 Method and circuit for controlling radiant heat of transistor using metal-insulator transition device Oct. 22, 2013
8552345 Method for operating a diesel fuel filter heater Oct. 8, 2013
8541720 Apparatus for remotely measuring surface temperature using embedded components Sep. 24, 2013
8536496 Adaptable layered heater system Sep. 17, 2013
8530802 Ceramic heater and mold Sep. 10, 2013
8513577 Device for controlling a thermo-electric system Aug. 20, 2013
8497453 Semiconductor device having variable parameter selection based on temperature Jul. 30, 2013
8467668 Infrared room heater system Jun. 18, 2013
8431873 Vane type electric heater and vane structure thereof Apr. 30, 2013
8395089 Electrical heating device Mar. 12, 2013
8395097 Electrical heating device Mar. 12, 2013
8383993 Temperature control device of electric heater using thermo-sensitive resin and safety device thereof Feb. 26, 2013
8367986 Heating element Feb. 5, 2013
8330084 Temperature-control circuit of a heating line and a temperature-control method thereof Dec. 11, 2012
8309889 Electrical circuit Nov. 13, 2012
8283602 Heating blanket Oct. 9, 2012
8263913 Device equipped with planar heater Sep. 11, 2012
8258441 Magnetic element temperature sensors Sep. 4, 2012
8253079 Temperature-control circuit of a heating line and a temperature-control method thereof Aug. 28, 2012
8232509 Retainer system Jul. 31, 2012
8217308 Heater-equipped seat Jul. 10, 2012
8212647 Device having at least one PTC resistor Jul. 3, 2012
8206614 Voltage switchable dielectric material having bonded particle constituents Jun. 26, 2012
8203102 Thermal type flow sensor Jun. 19, 2012
8183504 Surface mount multi-layer electrical circuit protection device with active element between PPTC layers May. 22, 2012
8183503 Encapsulated heating system May. 22, 2012
8164031 Electric trace tube bundle with internal branch circuit Apr. 24, 2012
8164035 Heating device having dual-core heating cable Apr. 24, 2012
8115146 Positive temperature coefficient heater Feb. 14, 2012
8110782 Heated architectural panel system and method Feb. 7, 2012
8084721 Electrical heating apparatus, method of manufacturing heat generator unit and pressing jig for use in manufacturing thereof Dec. 27, 2011
8063343 Heated breathing circuit detection Nov. 22, 2011
8057946 Integrated charge air heat exchanger Nov. 15, 2011
8044330 Electrically conductive adhesive Oct. 25, 2011
8039774 Electrical heater with a resistive neutral plane Oct. 18, 2011
8035063 Electronic power control for cooktop heaters Oct. 11, 2011
7994455 Control circuit for fast heating of a positive-temperature-coefficient heating component Aug. 9, 2011
7968826 Calibrated thermal sensing system utilizing resistance varying jumper configuration Jun. 28, 2011
7928345 Aircraft windshield defogging/deicing system and method of use thereof Apr. 19, 2011
7880581 PTC thermistor Feb. 1, 2011
7864026 Flexible averaging resistance temperature detector Jan. 4, 2011

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