Patents by Inventor Yellapragada S. Rao

Yellapragada S. Rao 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: 5373988
    Abstract: A rail fastening assembly for fastening a rail to a sleeper and comprising an insert and a complimentary resilient clip. The insert has a shank portion extending upwardly into a jaw. The jaw has a locating recess extending along the entire length of the upper surface and with the depth for receiving the clip. The base of the jaw has a seat with a ledge extending into a projection. The clip comprises a first and second loops, each having a flat surface.
    Type: Grant
    Filed: December 11, 1991
    Date of Patent: December 20, 1994
    Inventor: Yellapragada S. Rao