Patents by Inventor Jan E. M. Prahl

Jan E. M. Prahl 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: 5537764
    Abstract: The invention relates to a forefoot relief shoe (10) possessing a sole portion (11) that is substantially triangular in a side view or in a vertical longitudinal section having a thickness which decreases in the rearward direction and which terminates anteriorly before the the metatarsal region of the wearer. In order to increase the service life and to enhance the wearing comfort it is provided that the sole portion (11) is constructed in the form of a hollow section fitted with substantially vertical supports for connecting the base constructed so as to cover the area to its full extent and the upper body (12) constructed so as to cover the area to its full extent and adjacent to the foot bed (13), in which case the supports, at least within the central area, in the longitudinal axial direction toward the base, possess an increasing diameter or an increasing horizontal cross-section (FIG.
    Type: Grant
    Filed: October 25, 1994
    Date of Patent: July 23, 1996
    Assignee: Heil- und Hilfsmittel Vertriebs GmbH
    Inventor: Jan E. M. Prahl