Patents by Inventor Nathaniel O. Charles

Nathaniel O. Charles 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).

  • Puncture resistant insole
    Patent number: 6151803
    Abstract: An insole is capable of withstanding penetration of nails and other foreign objects. The insole is constructed of a substantially flexible, substantially puncture resistant material, such as a polymer fiber. The perimeter of the insole is curved upward, and includes a plurality of substantially v-shaped notches therein to enhance flexibility of the insole. A downwardly curved portion is embedded in a sole of an article of footwear. The downwardly curved portion substantially mirrors the portion of the perimeter of the insole which is curved upward.
    Type: Grant
    Filed: February 25, 1999
    Date of Patent: November 28, 2000
    Inventor: Nathaniel O. Charles