Patents by Inventor Warren F. Ziehl

Warren F. Ziehl 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).

  • Tool for measuring inclination and rotation
    Patent number: 4779353
    Abstract: A tool is provided for measuring the angles of inclination and rotation of the tool itself, especially for use in a borehole.
    Type: Grant
    Filed: March 26, 1987
    Date of Patent: October 25, 1988
    Assignee: Schlumberger Technology Corporation
    Inventors: Jose C. B. Lopes, Gary S. Stumolo, Warren F. Ziehl, Benoit Couet