Report copyright - USOO6397381B1 (12) United States Patent (10) Patent … 6,397,381 B1 Page 2 U.S. PATENT DOCUMENTS 5,897,640 A 4/1999 Veghte et al. 5,925,127 A 7/1999 Ahmad 5.535,326 A * 7/1996 Baskey
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