Rex Elmore Trigger Golf Aid

Rex Elmore Trigger Golf Aid is a “muscle memory” resistance training exercise band that anchors into the green/ground and clips to the balance point of the putter shaft. By stretching and holding in the finish position of a straight stroke creates an “afterimage” sensation of a good stroke.
I found the patent for this aid but couldn’t find it being sold anywhere.
Click here for the patent: Rex Elmore Trigger Golf Aid