Patents by Inventor Tam T. Lieu

Tam T. Lieu 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: 4801284
    Abstract: A water walking shoe has an outer bell portion constructed from a rigid plastic material. Vent holes are spaced about the periphery of the outer bell. An inner bell is constructed from a thin plastic sheet material and is received within the outer bell. A binding for attaching the outer bell to the foot of a user has an adjustable mounting. In use, the flexible inner bell serves to open and close the vent holes in the outer bell, thus enabling air to be selectively trapped or released from within the outer bell. This overcomes the suction effect and permits the wearer to more easily lift their foot from the surface of the water while wearing these shoes. In a second embodiment, a flexible skirt attached to a lower edge of the outer bell provides an improved seal and distributes the weight of the wearer over a larger surface area, thus increasing stability.
    Type: Grant
    Filed: November 16, 1987
    Date of Patent: January 31, 1989
    Inventor: Tam T. Lieu