Description  Claims  Drawing  Cited references 

US6942786B   [0002] 
US8302780B   [0002] 
US5832873A   [0011] 
US5545560A   [0011] 
US3721214A   [0011] 
US2010224574A1   [0011] 
US6494167B1   [0011] 
US2013213904A1   [0011] 
US6093315A   [0011]