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#Surfaces or backgrounds covered with repeated geometrical figures, figurative elements or inscriptions #Quadrilaterals #Letters or numerals forming geometrical figures, written or typographical matter in perspective #Surfaces or backgrounds covered with a repeated inscription #Squares #Quadrilateral figures with one or more convex or concave sides, quadrilateral with one side curved #Quadrilaterals containing other inscriptions #Letters written in double outline #Letters linked to a figurative element #Letters repeated by mirror effect or symmetrically in any position #Monograms formed of intertwined, overlapping or otherwise combined letters #Four colours #Surfaces or backgrounds covered with repeated geometrical figures or designs #Surfaces or backgrounds covered with lines or bands #Quadrilaterals containing one or more triangles or lines forming an angle (specify the content)