Description  Claims  Drawing  Cited references 

US3340382A   [0002] 
US2831951A   [0011] 
US3970822A   [0011] 
US9123755B   [0017] 
US9123756B   [0017] 
US9177840B   [0017] 
US9196513B   [0017] 
US7257464B   [0025] 
US7196295B   [0031] 
US20160353521A   [0032] 
US5280422A   [0034] 
US5552998A   [0034]