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
Application filed by Associated Telephone & TelegraphfiledCriticalAssociated Telephone & Telegraph
Priority to GR270101672ApriorityCriticalpatent/GR1672B/en
Publication of GR1672BpublicationCriticalpatent/GR1672B/en