Patents by Inventor James L. Cordell

James L. Cordell 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).

  • Apparatus and method for hydraulic makeup and control
    Patent number: 4133176
    Abstract: An adjustable hydraulic makeup and control system is provided for supplementing the primary hydraulic flow to overcome leakage and thus be able to maintain a constant pulling load on a drill pipe or other tool in a well hole for an indefinite length of time.
    Type: Grant
    Filed: May 18, 1977
    Date of Patent: January 9, 1979
    Assignee: Western Gear Corporation
    Inventors: Duane K. Russell, James L. Cordell