Some may find this amusing. http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=/netahtml/srchnum.htm&r=1&f=G&l=50&s1=6,732,157.WKU.&OS=PN/6,732,157&RS=PN/6,732,157