Patents by Inventor Glenn E. Carman

Glenn E. Carman 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 trunk barrier for pest control
    Patent number: 6230435
    Abstract: An apparatus and method for controlling tree pests are disclosed. The apparatus includes a band of compressible material and a barrier ring. The barrier ring is wrapped around the band of compressible material, which, in turn, is wrapped around the trunk of a tree. The barrier ring contains a recess that is filled with a substance that prevents the progression of pests onto upper levels of the tree. The method involves installing the apparatus of the invention onto the trunk of a tree.
    Type: Grant
    Filed: October 26, 1998
    Date of Patent: May 15, 2001
    Assignee: Philipp and Doris Washburn, Trustees of the Washburn Family Trust
    Inventor: Glenn E. Carman