It is not intended to identify {HEAD ~ key or critical elements} of {TAIL ~ the invention} or to delineate the scope of the invention 
It is not intended to identify { HEAD ~ key or critical elements } of { TAIL ~ the invention } or to delineate the scope of the invention
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH