Description  Claims  Drawing  Cited references 

US7349776B   [0019] 
DE102010028486   [0020] 
US5737714A   [0021] 
US5245542A   [0022] 
US4987966A   [0023] 
GB2492748A   [0117] 
GB2492655A   [0117] 
GB2499252A   [0117] 
US5719770A   [0121]