Patents by Inventor Robert L. Tidwell

Robert L. Tidwell 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).

  • Power trowel control device
    Patent number: 4911575
    Abstract: A control device which is fixed to the control arm of a concrete pwer trowel or concrete finishing machine approximately midway between the trowel and the trowel handle. The attachment, which is adjustable in length, relieves the operator from the necessity of controlling the power trowel by means of its handle and allows the operator to control the power trowel from various distances outside the perimeter of the poured concrete.
    Type: Grant
    Filed: August 29, 1989
    Date of Patent: March 27, 1990
    Inventor: Robert L. Tidwell