Patents by Inventor Frank J. Jindra

Frank J. Jindra 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: 4574497
    Abstract: This invention relates to a safety shoe of the type having an upper with a box toe cap in the toe portion thereof and an outer sole of relatively yielding, resilient and flexible material secured to the upper and having a supporting plate of relatively rigid material embedded in and surrounded by the material of the outer sole and having a configuration similar to the generally U-shaped configuration of the lower edge of the safety box toe and being disposed beneath said lower edge in registry therewith so as to impart additional support thereto when a blow or force is applied to the toe cap.In a preferred embodiment of the invention the supporting plate is formed of a relatively rigid, hard, polymeric material and has a plurality of apertures formed therein into which the material of the outer sole extends to help anchor the supporting plate in position.
    Type: Grant
    Filed: January 23, 1985
    Date of Patent: March 11, 1986
    Assignee: Endicott Johnson Corporation
    Inventor: Frank J. Jindra