Patents by Inventor Donald A. Hetherington

Donald A. Hetherington 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).

  • Cultivating tool and apparatus incorporating same
    Patent number: 7124522
    Abstract: A cultivating tool for breaking up and spreading plant material over and into the ground has opposed ends and upper, lower and intermediate portions extending longitudinally between the ends. The lower portion includes a cutting edge. The intermediate portion includes a forward outer surface extending concavely upwardly and forwardly from the lower portion to the upper portion and a rearward outer surface extending concavely upwardly and rearwardly from the lower portion to the upper portion. Cultivating apparatus includes the tool coupled to the end of a support arm. The arm may be an articulated arm and the coupling may be a pivotal coupling.
    Type: Grant
    Filed: March 6, 2003
    Date of Patent: October 24, 2006
    Inventor: Donald A. Hetherington
  • Cultivating tool and apparatus incorporating same
    Publication number: 20040068895
    Abstract: A cultivating tool for breaking up and spreading plant material over and into the ground has opposed ends and upper, lower and intermediate portions extending longitudinally between said ends. The lower portion includes a cutting edge. The intermediate portion includes a forward outer surface extending concavely upwardly and forwardly from the lower portion to the upper portion and a rearward outer surface extending concavely upwardly and rearwardly from the lower portion to the upper portion. Cultivating apparatus includes the tool coupled to the end of a support arm. The arm may be an articulated arm and the coupling may be a pivotal coupling.
    Type: Application
    Filed: March 6, 2003
    Publication date: April 15, 2004
    Inventor: Donald A. Hetherington