Description     Claims     Drawing  

US20120178842A   [0006] 
US20140128489A   [0007] 
US20040249029A   [0018]  [0018] 
US3937765A   [0019]  [0019] 
JP2000154277A   [0020]  [0020] 
WO2013034276A   [0022] 
US3306874A   [0023] 
US3306875A   [0023] 
US3257357A   [0023] 
US3257358A   [0023] 
US3078254A   [0031] 
US3402159A   [0031] 
US3297793A   [0031] 
US3265765A   [0031] 
US3594452A   [0031] 
GB1264741A   [0031]