Patents by Inventor Thomas E. Sisk

Thomas E. Sisk 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).

  • Tree grate
    Patent number: 4592165
    Abstract: Improved grate for protectively surrounding the base of a tree, including a support ring for surrounding the tree at a radially spaced distance therefrom and a series of spirally disposed members, the proximal ends of which are affixed to the support ring and the distal ends of which generally define an opening through which the trunk of the tree may extend.
    Type: Grant
    Filed: March 12, 1984
    Date of Patent: June 3, 1986
    Inventor: Thomas E. Sisk