USA Patents:
US 9,574,748 B2;
US 9,909,728 B2;
US 9,915,402 B2;
US 10,082,274 B2;
US 10,578,281 B2;
US 10,085,612 B2
 
Europe Patents:
EP 2 833 051 B1;
EP 3 211 291 B1
Other worldwide patents pending!