Patents:  
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Patent Number: File Size:
Patent 5,660,602 84 KB
Patent 5,666,923 88 KB
Patent 5,787,864 92 KB
Patent 6,397,790 60 KB
Patent 6,405,720 52 KB
Patent 6,508,209 60 KB
Patent 6,739,125 52 KB
Patent 6,823,852