Patents by Inventor Mei-Ling Liu

Mei-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).

  • Parquet block with woodwork joints
    Publication number: 20050108970
    Abstract: A parquet block with a woodwork joint has two parallel abutting sides, a longitudinal notch, a longitudinal tongue, two transverse grooves and two transverse tongues. The longitudinal notch, the longitudinal tongue, the transverse grooves and the transverse tongues on adjacent parquet blocks interlock to hold the parquet blocks securely in the longitudinal and transverse directions.
    Type: Application
    Filed: November 25, 2003
    Publication date: May 26, 2005
    Inventor: Mei-Ling Liu
  • Foldable frame of a playpen
    Patent number: 6263525
    Abstract: This invention concerns a foldable frame of a playpen. The frame consists of a certain simply and quickly. The folded volume is very small in order to bring convenience in storing and transportation, and in addition, has a space defined therein to contain accessories such as boards and bed clothes.
    Type: Grant
    Filed: March 9, 2000
    Date of Patent: July 24, 2001
    Inventor: Mei-Ling Liu