Patents by Inventor David V. Spangler

David V. Spangler 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).

  • Bicycle frame
    Patent number: 5221102
    Abstract: A bicycle frame which includes a plurality of structurally supporting tubes which are constructed in an aerodynamic shape resembling a teardrop. Each of the aerodynamic tubes have a major axis which is approximately three and one half times greater than the length of the minor axis. Each of the aerodynamic tubes are extruded incorporating an x-shaped cross brace the entire length of the tube within the internal chamber of the tube. The aerodynamic tube is to be constructed of aluminum.
    Type: Grant
    Filed: November 25, 1991
    Date of Patent: June 22, 1993
    Inventor: David V. Spangler