Patents by Inventor Louis N. Heller

Louis N. 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).

  • Patent number: D251650
    Type: Grant
    Filed: August 22, 1977
    Date of Patent: April 24, 1979
    Inventor: Louis N. Heller