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 AU57862/90Aexternal-prioritypatent/AU619117B2/en
Application filed by At & T CorpfiledCriticalAt & T Corp
Priority to IN431MA1991priorityCriticalpatent/IN179880B/en
Publication of IN179880BpublicationCriticalpatent/IN179880B/en