Patents by Inventor David B. Mattison

David B. Mattison 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).

  • CUTTING SHAFT FOR VERTICAL STUMP GRINDER
    Publication number: 20150083275
    Abstract: The invention relates to a stump grinder that rotates about a vertical axis and includes an improved cutting shaft. The improved cutting shaft includes a base portion attached to a drive source, and a grinding shaft attached to and extending downwardly from the base portion. The grinding shaft includes replaceable cutting teeth and a replaceable grinding tip.
    Type: Application
    Filed: September 25, 2014
    Publication date: March 26, 2015
    Inventors: James J. Paumier, Todd D. Mattison, David B. Mattison