Patents by Inventor Amarawansa S. Wanniarachchi

Amarawansa S. Wanniarachchi 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).

  • Method for automatic shoe ventilation
    Patent number: 5819438
    Abstract: A simple and reliable mechanical design and method for providing positive air ventilation for shoes, sneakers and the like, including an air pump secured to the top, forward portion of the shoe instep, and the air pump being operated by a push-pull element that takes advantage of the deflection of the instep portion of the shoe upper in response to the walking or running action of the shoe wearer.
    Type: Grant
    Filed: May 5, 1995
    Date of Patent: October 13, 1998
    Inventor: Amarawansa S. Wanniarachchi