Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US08/318,452external-prioritypatent/US5481592A/en
Application filed by At & T CorpfiledCriticalAt & T Corp
Priority to SG1995001479ApriorityCriticalpatent/SG33531A1/en
Publication of SG33531A1publicationCriticalpatent/SG33531A1/en