Patents by Inventor Joseph M. Mitchell

Joseph M. Mitchell 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).

  • Hydraulic stop
    Patent number: 4273481
    Abstract: An automatic hydraulic stop for use with a numerical control machine and cutting tool. The stop senses the distance to a work piece, limits the depth of penetration of the tool into a work piece and provides protection for inadvertent travel of spindle of the numerical control machine beyond a projected point.
    Type: Grant
    Filed: December 17, 1979
    Date of Patent: June 16, 1981
    Assignee: McDonnell Douglas Corporation
    Inventors: John E. Corley, Joseph M. Mitchell, Charles M. Andert