Protected by U.S. patents 9,639,387; 9,626,237; 9,569,286; 9,483,296; 9,251,167; 9,229,748; 9,218,359; 9,209,976; 9,208,169; 9,208,004; 9,207,934; 9,106,425; 9,104,517; 9,021,015; 8,959,183; 8,954,958; 8,914,427; 8,782,106; 8,776,038; 8,763,009; 8,762,495; 8,769,051; 8,626,806; 8,468,175 and 8,434,093.