Patents by Inventor Karl S. Ratanangsu

Karl S. Ratanangsu 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: 4370817
    Abstract: An elevating boot wherein the heel section of the boot includes a height increasing insert for the wearer located within the boot in the area of the heel. This insert is to be removable, or it can be integrally secured to the boot. The forwardmost section of the boot includes a significant amount of space so as to make the size of the boot larger so as to be in proportion to the appearance of the increased height of the wearer. Within the space is to be located a second insert. A connecting section connects said first and second inserts.
    Type: Grant
    Filed: February 13, 1981
    Date of Patent: February 1, 1983
    Inventor: Karl S. Ratanangsu