Patents Assigned to Tong De Limited
  • Muscle stimulator
    Patent number: D834209
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: November 20, 2018
    Assignee: Tong De Limited
    Inventor: Huanyi Tan
  • Pair of in-ear headphones
    Patent number: D837768
    Type: Grant
    Filed: February 16, 2017
    Date of Patent: January 8, 2019
    Assignee: Tong De Limited
    Inventor: Weisheng Deng