Patents by Inventor Hans Gunther Hoffbauer

Hans Gunther Hoffbauer 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).

  • Cine projection screen
    Patent number: 3942868
    Abstract: The specification describes a roll up cine projection screen comprising struts for holding it taut in the extended condition for use. It is adapted to be held on a rolling up rod or a tubular casing on a carrier and in the case of which the struts are adapted to pivot with the cine projection screen held taut by them about a horizontal axis. The screen can be secured in several angular positions by means of two pivot bearings having vertical and horizontal axis respectively.
    Type: Grant
    Filed: April 23, 1974
    Date of Patent: March 9, 1976
    Assignee: Mechanische Weberie GmbH.
    Inventors: Hans Gunther Hoffbauer, Karl Kaufmann