Patents by Inventor Wenyan Lang

Wenyan Lang 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).

  • Pen
    Patent number: D641409
    Type: Grant
    Filed: July 16, 2010
    Date of Patent: July 12, 2011
    Assignee: Beifa Group Co., Ltd.
    Inventors: Tao Wang, Wenyan Lang
  • Pen
    Patent number: D647964
    Type: Grant
    Filed: April 29, 2011
    Date of Patent: November 1, 2011
    Assignee: Beifa Group Co., Ltd.
    Inventors: Tao Wang, Wenyan Lang