By Bill Ostrander; posted September 21, 2012 View Original: Click to zoom, then click to magnify (1024 x 545) 115KB
A detail of the ID tag. Here's a link to the patent: http://www.google.com/patents?id=qsh5AAAAEBAJ&pg=PA1&source=gbs_selected_pages&cad=1#v=onepage&q&f=false