Patents Assigned to QINGDAO CHANGHUAI MACHINERY CO., LTD.
  • Anti-loosening wire puller
    Patent number: D987417
    Type: Grant
    Filed: March 31, 2021
    Date of Patent: May 30, 2023
    Assignee: QINGDAO CHANGHUAI MACHINERY CO., LTD.
    Inventor: Daning Zhou