Patents Assigned to QINGDAO GREN TECHNOLOGY CO., LTD.
  • Vertical sound box
    Patent number: D787472
    Type: Grant
    Filed: February 4, 2016
    Date of Patent: May 23, 2017
    Assignee: QINGDAO GREN TECHNOLOGY CO., LTD.
    Inventor: Rong Liu
  • Horizontal sound box
    Patent number: D790511
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: June 27, 2017
    Assignee: QINGDAO GREN TECHNOLOGY CO., LTD.
    Inventors: Rong Liu, Jian Zhang