US Patent 6909074 Telescopic heat-generating mat

A portable device for providing a heated surface to melt snow and ice therefrom includes a reservoir having a top surface provided with an opening, a plurality of apertures, and a mechanism for conveniently heating fluid disposed within the reservoir. The heating mechanism is operably connected to the reservoir, a plurality of mats removably attachable to each other along a substantially rectilinear path and a plurality of flexible conduits in fluid communication with the reservoir and the plurality of mats. The heating mechanism includes a plurality of programmable sensors for selectively activating the device when a temperature falls below a desired temperature threshold.