Patents by Inventor Billie M. Crutchfield

Billie M. Crutchfield 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).

  • Method and apparatus for controlling the movement of a vehicle along a prescribed path
    Patent number: 3942720
    Abstract: A vehicle path controller has a plurality of cylindrical support rollers arranged in section(s) with each roller axis (of rotation) substantially parallel to and along the prescribed path. An entrance ramp is positioned adjacent the initial roller section and facilitates the driving of the vehicle onto same. The rollers are rotatably connected to framework and are conveniently arranged in two separate paths, one path for the left wheels and one path for the right wheels. Guide rollers are also connected to the framework but have an axis of rotation elevated with reference to the vehicle support rollers.
    Type: Grant
    Filed: February 24, 1975
    Date of Patent: March 9, 1976
    Inventor: Billie M. Crutchfield
  • Bubble display device
    Patent number: D252295
    Type: Grant
    Filed: April 11, 1977
    Date of Patent: July 3, 1979
    Inventor: Billie M. Crutchfield