[11] 2,191,158 [13] c [51] int.cl. 6h04m 3/42 [25] en [54] screening of incoming telephone calls prior to call completion to the destination party [54] filtrage des appels telephoniques incidents avant la connexion au destinataire [72] ardon, menachem tsur, us [73] lucent technologies inc., us [22] [30] us (572,956)