A method and apparatus for selective long term and/or permanent hair removal from a biological subject by iontophoretic delivery of a chemical depilatory agent and a substance for increasing skin permeability, e.g. sodium salicylate, deeply into a hair removal site for effecting varying degrees of damage...http://www.google.es/patents/US6206869?utm_source=gb-gplus-sharePatente US6206869 - Hair removal system
