US Trademark Classification US19 Building materials 混凝土墓室（019-73） Class 19 混凝土墓室 019-73 Chinese 混凝土墓室 English Concrete vaults Spanish Bóvedas de hormigón Term ID 019-73 Class 19 Type Goods Status Active · added, not since modified (A) Effective date 1991-04-02 Version 07-1997