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Click to view PDF files:
No.
5,004,681 issued on April 2, 1991; Re-examination Certificate
April 10, 2000
No.
5,192,553 issued on March 9, 1993
No.
6,461,645 issued on October 8, 2002
No.
6,569,427 issued on May 27, 2003
No.
6,605,275 on August 12, 2003 |
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