U.S. Patent 8,327,561
U.S. Patent 8,752,310
U.S. Patent 9,015,965
U.S. Patent 8,992,038
U.S. Patent 9,301,574
U.S. Patent 9,265,299
U.S. Patent 9,781,967
U.S. Patent 9,848,668
U.S. Patent 10,390,583
Other Patents Pending