US Trademark Classification US11 Lighting, heating and air conditioning 工业用炭化炉（011-624） Class 11 工业用炭化炉 011-624 Chinese 工业用炭化炉 English Carbonizing furnaces for industrial purposes Term ID 011-624 Class 11 Type Goods Status Active · modified since entry (M) Effective date 2023-02-16 Version 12-2023