A method of treating a surface for the removal of a surface portion comprising irradiating the surface with laser light, wherein the irradiation is effected by covering said surface in a sequential manner with a plurality of discrete spots of laser light. The spots of laser light overlap and may be arranged...http://www.google.com.au/patents/US7521001?utm_source=gb-gplus-sharePatent US7521001 - Surface treatment of concrete
