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Certificate No. 3402678 Appearance design patent certificate Appearance Design Name: Sand Wall (1) Designer: Qiao Hui Patent No.: ZL201530151557.0 Patent application date: May 15, 2015 Patent owner: Qiao Hui Authorization Announcement Date: September 30, 2015 This design has undergone a preliminary examination in accordance with the Patent Law of the People’s Republic of China, and […]

Certificate No. 3395104 Withholding special surface Appearance design patent certificate Appearance Design Name: barrier Designer: Qiao Hui Patent No.: ZL 2015 30151336.3 Patent application date: May 14, 2015 Patent owner: Qiao Hui Authorization Announcement Date: September 23, 2015 This design has undergone a preliminary examination in accordance with the Patent Law of the People’s Republic

  Certificate No. 5526659 Utility model patent certificate Utility model name: a multi-functional explosion-proof and flood-proof sandbag and its sand wall Inventor: Qiao Hui Patent No.: ZL 2016 20334412.3 Patent application date: April 19, 2016 Patent owner: Qiao Hui Authorization Announcement Date: September 07, 2016 This utility model has undergone a preliminary examination in accordance