A cleaning device for dislodging, and picking up and retaining foreign particles and other matter adhered on athletic footwear soles or other discrete surfaces, comprising a pad assembly having an inner cushion pad element enclosed within a fabric outer cover, and attachment means on the device for removably...http://www.google.es/patents/US4823426?utm_source=gb-gplus-sharePatente US4823426 - Shoe sole cleaning device
