Patents by Inventor Wai F. Cheng

Wai F. Cheng 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: 5489063
    Abstract: A plastic container has four trapezoidal walls that slant upward and outward to create a top that is larger than its bottom. Each sidewall has a closure flap that is connected to it by a living hinge. There are projections on two opposed sidewalls that are attachment points for a handle. The handles have several apertures that mate with the projections. The plurality of apertures allow the handle to be attached in close relation to the top of the container, allowing the handle to act as a tie-down for the closure flaps. The container also employs several means to limit the extent of nesting of the containers.
    Type: Grant
    Filed: July 18, 1991
    Date of Patent: February 6, 1996
    Assignee: W-Y Plastics Products Corp.
    Inventors: Brian Buchalski, Wai F. Cheng, Michael Lai, Nelson Yeung