Patents by Inventor Franz Gebauer

Franz Gebauer 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).

  • Hollow formwork elements for producing concrete structures
    Patent number: 3973749
    Abstract: The present invention relates to reusable hollow formwork elements of elastic material which may be used for the concreting of pipelines, and which by filling with a gaseous or liquid medium, can be given compressive resistance. The invention also relates to a method of operating such formwork elements.
    Type: Grant
    Filed: May 22, 1974
    Date of Patent: August 10, 1976
    Assignee: Semperit Aktiengesellschaft
    Inventors: Franz Friedl, Erich Kohler, Hans Holler, Franz Gebauer