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 GB7844177Aexternal-prioritypatent/GB2033427B/en
Priority claimed from GB7922791Aexternal-prioritypatent/GB2051861B/en
Priority claimed from GB7932300Aexternal-prioritypatent/GB2038361B/en
Priority claimed from IN699/DEL/79Aexternal-prioritypatent/IN153802B/en
Application filed by IbmfiledCriticalIbm
Priority to IN746/DEL/82ApriorityCriticalpatent/IN153811B/en
Publication of IN153811BpublicationCriticalpatent/IN153811B/en