US Trademark Classification US19 Building materials 混凝土地板（019-484） Class 19 混凝土地板 019-484 Chinese 混凝土地板 English Concrete floors Spanish Pisos de concreto Term ID 019-484 Class 19 Type Goods Status Active · added, not since modified (A) Effective date 2004-07-20 Version 08-2002