Patents by Inventor Chang Kun Ah

Chang Kun Ah 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: 3973336
    Abstract: A shoe having ventilating means for supplying fresh air to the interior of the shoe has a base sole and an inner bottom sole defining between them an air distributing chamber and a space for accommodating an air supplying chamber to the rear of the air distributing chamber. The inner sole has an aperture therein between the air distributing chamber and the interior of the shoe for passing air from the air distributing chamber to the interior of the shoe. A collapsible resilient air supplying chamber is provided in the space for accommodating the air supplying chamber and having an air distributing conduit extending therefrom into the air distributing chamber and having an air intake conduit extending thereinto from outside of the shoe. Counterflow preventing valve means are provided in each conduit, and a rigid press member has a forward end anchored in one of the soles and has the rear end extending into the space for accommodating the air supplying chamber above the air supplying chamber.
    Type: Grant
    Filed: April 29, 1975
    Date of Patent: August 10, 1976
    Inventor: Chang Kun Ah