Patents by Inventor Jen-Sheng Liao

Jen-Sheng Liao 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).

  • Woodworking drill bit
    Patent number: D687871
    Type: Grant
    Filed: January 3, 2013
    Date of Patent: August 13, 2013
    Inventors: Chung-Liang Liao, Chung-Hung Liao, Jen-Sheng Liao
  • Woodworking drill bit
    Patent number: D709111
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: July 15, 2014
    Inventors: Chung-Liang Liao, Chung-Hung Liao, Jen-Sheng Liao
  • Flat drill bit
    Patent number: D930056
    Type: Grant
    Filed: December 31, 2019
    Date of Patent: September 7, 2021
    Inventors: Chung Liang Liao, Jen Sheng Liao, Chung Hung Liao