Patents by Inventor Clark W. Liu

Clark W. 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).

  • User assembled desk top file
    Patent number: 4664283
    Abstract: An all-plastic desk top file or tray easily user assembled from planar panels that lock together with either snap-in integral barb or lateral tongue and slot connections without the use of any tools, and the tray is modular so trays can be stacked vertically and horizontally and locked together.
    Type: Grant
    Filed: August 28, 1986
    Date of Patent: May 12, 1987
    Inventor: Clark W. Liu
  • User assembled desk top file
    Patent number: 4625879
    Abstract: An all-plastic desk top vertical file or stand easily user assembled from planar panels that lock together with either snap-in integral barb or lateral tongue and slot connections without the use of any tools.
    Type: Grant
    Filed: October 31, 1985
    Date of Patent: December 2, 1986
    Inventor: Clark W. Liu