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 CA002038626Aexternal-prioritypatent/CA2038626A1/en
Application filed by At & T Corp, Scapa Group PlcfiledCriticalAt & T Corp
Publication of IN180457BpublicationCriticalpatent/IN180457B/en