The methods are particularly applicable in woodworking equipment such as power saws to distinguish contact between a person...http://www.google.es/patents/US8087438?utm_source=gb-gplus-sharePatente US8087438 - Detection systems for power equipment B???squeda avanzada de patentes N???mero de publicaci???nUS8087438 B2Tipo de publicaci???nConcesi???n N???mero de solicitudUS 12/799,915 Fecha de public