The products that are shown are protected under license by one or more of the following patents: U.S. Patent Numbers 4896470, 5072558, 5436425, 5440842, 5749185, 5755065, 5770286, 5788398, 5839235, 5897102, 6017165, 6023894, 6027278, 6040546, 6098356, 6098356, 6108,850, 6151850, 6176051, 6234709, 6380508, 6381912, 6393781, 6513287, 6631596, 6758023, 6761002, 6817148, and U.S. and Foreign Patents Pending.

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