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U.S. Patent No. 8,010,425 Contact CNWBhttp://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&co1=AND&d=PTXT&s1=8,010,425.PN.&OS=PN/8,010,425&RS=PN/8,010,425mailto:jack@cnwb.com?subject=CNWB.comshapeimage_1_link_0shapeimage_1_link_1
U.S. Patent No. 8,010,425