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.)
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Publication date
Priority claimed from US08/268,902external-prioritypatent/US5550896A/en
Application filed by At & T CorpfiledCriticalAt & T Corp
Priority to SG1995000771ApriorityCriticalpatent/SG32390A1/en
Publication of SG32390A1publicationCriticalpatent/SG32390A1/en