Patents by Inventor Quen Ling Liu

Quen Ling Liu 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).

  • Patent number: 4091468
    Abstract: A lower garment is made up of a front panel and a rear panel and includes an upper part extending downwardly from a waist region of the garment to a crotch region thereof, at which the front panel is secured to the rear panel. The garment also includes a lower part extending downwardly from the crotch region in the form of a skirt having a single, continuous lower boundary.
    Type: Grant
    Filed: January 12, 1977
    Date of Patent: May 30, 1978
    Inventors: Dickson Tak Sun Wong, Quen Ling Liu