Posted on February 17, 2015April 19, 2017 by Delko Tools U.S Patent Granted Delko Tools is pleased to announce that our U.S Patent application has been accepted. The Delko Tools Internal Applicator Attachment is now covered under patent number 8,955,573 in the United States Post navigationPrevious post: Australian Patent IssuedNext post: Join the Delko Tools Facebook Page!