Patents by Inventor David John Willardson

David John Willardson 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).

  • Publication number: 20180332927
    Abstract: A shoe with a spring heel is provided. The shoe includes a shoe top portion, a sole and a spring. The shoe top portion is operable to retain a user foot within. The sole is secured to the bottom of the shoe top portion. The sole includes a front toe portion and a rear heel portion. The rear heel portion includes an upper inner surface and lower inner surface formed by a cutout portion. The spring is disposed within the cutout portion. The spring includes an upper plate and a lower plate joined by a U-shaped bend. The upper plate is secured to the upper inner surface and the lower plate is secured to the lower inner surface of the rear heel portion.
    Type: Application
    Filed: May 19, 2017
    Publication date: November 22, 2018
    Inventor: David John Willardson