Legal status (The legal status 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 status listed.)
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NATIONAL RESEARCH DEVELOPMENT CORP
Original Assignee
NATIONAL RESEARCH DEVELOPMENT CORP
Filing date
Publication date
Priority claimed from GB11598/74Aexternal-prioritypatent/GB1504691A/en
Application filed by NATIONAL RESEARCH DEVELOPMENT CORPfiledCriticalNATIONAL RESEARCH DEVELOPMENT CORP
Application grantedgrantedCritical
Publication of AU7911675ApublicationCriticalpatent/AU7911675A/en
Publication of AU496575B2publicationCriticalpatent/AU496575B2/en