==== Sample patents ====
{|border="2" cellspacing="0" cellpadding="4" width="80%"
|!align = "center" bgcolor = "#00CCFF"|Patent|!bgcolor = "#00CCFF"|Assignee|!bgcolor = "#00CCFF"|Title|!bgcolor = "#00CCFF"|Abstract
|-
|[http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2Fsrchnum.htm&r=1&f=G&l=50&s1=6468649.PN.&OS=PN/6468649&RS=PN/6468649 US6468649 B1]