US Trademark Classification US19 Building materials 混凝土桩（019-987） Class 19 混凝土桩 019-987 Chinese 混凝土桩 English Concrete piles Spanish Pilotes de hormigón Term ID 019-987 Class 19 Type Goods Status Active · added, not since modified (A) Effective date 2012-03-08 Version 10-2012