US Trademark Classification US37 Construction and repair 铁路车辆维护和修理(037-2707) Class 37 铁路车辆维护和修理 037-2707 Chinese 铁路车辆维护和修理 English Repair and maintenance of railway vehicles Term ID 037-2707 Class 37 Type Services Status Active · added, not since modified (A) Effective date 2022-04-28 Version 11-2022