Patents by Inventor David L. Hirschfeld

David L. Hirschfeld 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).

  • Guideway for Maglev transportation system and method for assembly
    Publication number: 20040182275
    Abstract: Functional elements in a railway track are supported on structural elements supported on the ground. Electromagnetic circuitry on a railroad operates in conjunction with the functional elements to provide electromagnetic levitation and drive for the railroad. The functional elements are fabricated in relatively small sections, approximately six meters in length. The structural elements, which support the functional elements and the functional elements are fabricated separately and shipped separately to the site of the railway track where they are assembled together to form the support for the railroad.
    Type: Application
    Filed: March 20, 2004
    Publication date: September 23, 2004
    Inventors: Karl H. Frank, Billy C. Lannom, David L. Hirschfeld, Wendall W. Hirschfeld