Patents by Inventor Fritz P. Heller

Fritz P. Heller 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).

  • Head-up displays
    Patent number: 4178074
    Abstract: A head-up display optical projector using a Petzval type collimating optical system wherein a secondary image is injected through an optically flat peripheral surface of a lens included in the Petzval lens group closer to the main image display surface of the projector, the lens incorporating an interior flat dichroic film for combining the main and secondary images.
    Type: Grant
    Filed: March 16, 1978
    Date of Patent: December 11, 1979
    Assignee: Elliott Brothers (London) Limited
    Inventor: Fritz P. Heller