US Trademark Classification US11 Lighting, heating and air conditioning 洁净室（011-113） Class 11 Clean rooms 011-113 洁净室 Chinese 洁净室 English Clean rooms Spanish Salas limpias Term ID 011-113 Class 11 Type Goods Status Active · added, not since modified (A) Effective date 1991-04-02 Version 07-1997