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Patent No. |
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5,432,755 |
5,436,556 |
6,058,076 |
6,079,275 |
6,163,504 |
6,923,063 |
7,051,577 |
7,540,183 |
8,245,576 |
8,468,874 |
8,872,652 |
8,872,654 |
9,786,033 |
9,823,158 |