U.S. Patents
6,695,861
7,753,889
7,931,658
7,935,127
8,016,794
8,016,813
8,029,476
8,038,653
8,137,323
8,142,401
8,147,459
8,235,948
8,252,004
8,328,764
8,343,108
8,394,066
8,444,603
8,579,864
8,585,654
8,628,511
8,715,295
8,771,232
8,920,380
8,932,263
8,936,576
8,956,329
8,974,434
8,986,257
9,056,187
9,205,230
9,227,040
9,283,355
9,314,596
9,381,321
9,381,322
9,381,323
9,415,190
9,545,503
9,550,043
9,656,045
9,662,475
9,662,476
9,782,567
9,789,288
9,849,269
9,884,168
9,907,934
9,919,134
9,937,327
10,046,142
10,058,682
10,201,682
10,279,148
10,293,140
10,315,009
10,335,576
10,342,954
10,384,037
10,420,917
10,471,236
10,532,188
European Patents
1539002
1998837
2002857
2303388
2310076
2349438
2393543
2666509
2755712
2814553
2906127
Additional patents pending