Patents by Inventor R. Robert Castillo

R. Robert Castillo 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).

  • Cholangiography catheter inserter
    Patent number: 5167645
    Abstract: The disclosure is directed to a cholangiography catheter insertion tool, or introducer. In the preferred embodiment, the tool comprises a hollow cylinder with an ovate directional aperture lying in the plane of a tangent to the cylinder and parallel to the longitudinal axis of the cylinder. Also disclosed is a method of using the tool.
    Type: Grant
    Filed: July 24, 1991
    Date of Patent: December 1, 1992
    Inventor: R. Robert Castillo