Patents by Inventor Ling-Yu Huang Chuang

Ling-Yu Huang Chuang 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).

  • Combination lock
    Patent number: D401836
    Type: Grant
    Filed: November 4, 1997
    Date of Patent: December 1, 1998
    Inventor: Ling-Yu Huang Chuang
  • Combination lock
    Patent number: D401837
    Type: Grant
    Filed: November 4, 1997
    Date of Patent: December 1, 1998
    Inventor: Ling-Yu Huang Chuang