Description  Claims  Drawing  Cited references 

US4677910A   [0003]  [0014]  [0022] 
US3939621A   [0007] 
US4045944A   [0007] 
US4453707A   [0007] 
US4558557A   [0007] 
EP0656309A   [0007] 
EP1607355A   [0007] 
GB2262729A   [0007] 
WO0149464A   [0007] 
EP0598679A   [0008] 
WO2004016433A   [0009]  [0012]  [0015]  [0020]  [0022] 
US5660106A   [0012]  [0012]  [0013]  [0022]  [0022] 
DE3047390   [0013]  [0022] 
US4843959A   [0016]  [0019] 
EP0286317A1   [0016] 
WO2005018945A   [0020]  [0022] 
EP1731324A   [0020]  [0022] 
DE1486894A   [0021]