Patents by Inventor Frederick W. Craig

Frederick W. Craig 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).

  • Post driving attachment for tractor
    Patent number: 4139067
    Abstract: An apparatus for driving posts into the ground, comprises a hammer for striking the top of the post to be driven, an articulated arm for connecting the hammer to a mobile power unit; and means for raising the articulated arm so that the hammer is above the post. The hammer is pivotally connected to the arm so that the hammer will strike the top of the post generally squarely when the power unit is level and when the power unit is not level.
    Type: Grant
    Filed: October 4, 1977
    Date of Patent: February 13, 1979
    Inventor: Frederick W. Craig