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Covered by one or more of the following US patents:
5,330,064; 5,386,787; 5,456,191; 5,471,922; 5,483,782; 5,503,087;5,628,522
5,746,063; 5,765,386; 5,816,051; 5,931,018; 5,957,309; 6,062,401; 6,131,399
6,149,120; 6,173,575; 6,322,180; 6,366,313; 6,419,098; 6,474,757; D480,528; D481,513.
Other US & foreign patents pending.
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