Patents by Inventor Frederick Littlefield

Frederick Littlefield 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).

  • Omni-directional collinear antenna
    Publication number: 20060227061
    Abstract: An antenna includes a differential transmission line and a center conductor, where the center conductor is at least partially contained within the differential transmission line and at least partially protruding therefrom. A first conductive flat element is connected to the center conductor and a flat meander-line structure is integral with the first conductive flat element. In addition, a second conductive flat element is integral with the flat meander-line structure.
    Type: Application
    Filed: April 6, 2005
    Publication date: October 12, 2006
    Inventors: Frederick Littlefield, Adam Alevy, John Sanford, Shawn Johnson, Eugene MacDonald