Patents by Inventor Robert L. Hope

Robert L. Hope 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).

  • Portable top drive
    Patent number: 5755296
    Abstract: A portable top drive drilling unit that is a self-contained assembly of components adapted for quick installation in a drilling rig and which requires a minimum of modification to the rig structure.
    Type: Grant
    Filed: September 13, 1994
    Date of Patent: May 26, 1998
    Assignee: Nabors Industries, Inc.
    Inventors: Allan S. Richardson, Robert L. Hope