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 IN636/CAL/79Aexternal-prioritypatent/IN149931B/en
Application filed by Somnath RoyfiledCriticalSomnath Roy
Priority to IN748/CAL/80ApriorityCriticalpatent/IN154464B/en
Priority to IN649/CAL/82Aprioritypatent/IN154364B/en
Publication of IN154464BpublicationCriticalpatent/IN154464B/en