PTC heating device having selectively variable temperature level
PTC Heating element
PTC heating element
PTC heating unit suitable for use in motor vehicles
PTC heating unit suitable for use in motor vehicles
PTC heating wire
PTC Honeycomb heating element with multiple electrode layers
PTC planar heater and method for adjusting the resistance of the
PTC resistance heater
PTC thermistor
PTC thermistor controlled electric diesel fuel heater
PTC thermistor elements and heating devices incorporating same
PTC thermistor heating device
PTC-element, protective device and electric circuit board
Pulsating hot-air heat-up system
Pulse electrothermal and heat-storage ice detachment...
Pulse frequency modulation control for a heater
Pulse width modulated defroster
Pulse width modulated defroster
Pulse width modulation of printhead voltage