Patents by Inventor Dung-An Chang

Dung-An Chang 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).

  • Pin pad
    Patent number: D685789
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: July 9, 2013
    Assignee: Uniform Industrial Corp.
    Inventor: Dung-An Chang
  • Digital signature pad
    Patent number: D712407
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: September 2, 2014
    Assignee: Uniform Industrial Corp.
    Inventor: Dung-An Chang
  • Point of sales terminal
    Patent number: D807424
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: January 9, 2018
    Assignee: UNIFORM INDUSTRIAL CORP.
    Inventors: Dung-An Chang, Kang-Ting Chao