Patents by Inventor Yingchang Ma

Yingchang Ma has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Attachment comb for hair cutting appliance
    Patent number: D965897
    Type: Grant
    Filed: August 26, 2020
    Date of Patent: October 4, 2022
    Assignee: WAHL CLIPPER CORPORATION
    Inventors: Yingchang Ma, Chao Yang, Tangwen Xu, Chenglu Huang, George William Gassman, Chad Aulwes
  • Attachment comb for hair cutting appliance
    Patent number: D965898
    Type: Grant
    Filed: August 26, 2020
    Date of Patent: October 4, 2022
    Assignee: WAHL CLIPPER CORPORATION
    Inventors: Yingchang Ma, Chao Yang, Tangwen Xu, Chenglu Huang, George William Gassman, Chad Aulwes
  • Hair clipper
    Patent number: D973278
    Type: Grant
    Filed: August 21, 2020
    Date of Patent: December 20, 2022
    Assignee: WAHL CLIPPER CORPORATION
    Inventors: Connor Brandt, Zhenfeng Qiu, Yingchang Ma, Qing Wang
  • Hair clipper lid
    Patent number: D973279
    Type: Grant
    Filed: August 21, 2020
    Date of Patent: December 20, 2022
    Assignee: WAHL CLIPPER CORPORATION
    Inventors: Connor Brandt, Zhenfeng Qiu, Yingchang Ma, Qing Wang