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October 21, 2008 |
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June 13, 2006 |
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February 1, 2005 |
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September 21, 2004 |
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August 24, 2004 |
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July 27, 2004 |
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July 27, 2004 |
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April 27, 2004 |
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March 30, 2004 |
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February 3, 2004 |
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November 25, 2003 |
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November 18, 2003 |
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November 4, 2003 |
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Patent no. 6,633,656
October 14, 2003 |
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October 7, 2003 |
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July 29, 2003 |
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May 27, 2003 |
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May 7, 2003 |
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April 15, 2003 |
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Patent no. 6,508,403
January 21, 2003 |
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Patent no. 6,510,266
January 21, 2003 |
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Patent no. 6,498,888
December 24, 2002 |
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November 19, 2002 |
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November 12, 2002 |
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September 3, 2002 |
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August 20, 2002 |
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August 20, 2002 |
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August 20, 2002 |
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July 23, 2002 |
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May 28, 2002 |
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April 23, 2002 |
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Patent no. 6,366,394
April 2, 2002 |
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January 8, 2002 |
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December 4, 2001 |
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August 7, 2001 |
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March 13, 2001 |
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January 30, 2001 |
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October 10, 2000 |
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October 10, 2000 |
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February 15, 2000 |
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November 2, 1999 |
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October 5, 1999 |
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November 3, 1998 |
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June 23, 1998 |
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June 10, 1997 |
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September 17, 1996 |
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February 20, 1996 |
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