Patents by Inventor William W. Bishop

William W. Bishop 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).

  • Dual conduit drill stem member and connection
    Patent number: 3998479
    Abstract: When adjacent pipes are made up by tool joints on outer tubes of dual conduit drill pipe, radially spaced pin and box on inner tubes shrink fitted in tool joints are sealed by bullet shaped seal rings around pin and in box compressed against shoulders and almost enclosed.
    Type: Grant
    Filed: December 23, 1974
    Date of Patent: December 21, 1976
    Assignee: Smith International, Inc.
    Inventor: William W. Bishop