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 J A GrahamfiledCriticalJ A Graham
Priority to NZ19295280ApriorityCriticalpatent/NZ192952A/en
Priority to NZ19461780Aprioritypatent/NZ194617A/en
Priority to GB8105348Aprioritypatent/GB2072234B/en
Priority to AU67598/81Aprioritypatent/AU541831B2/en
Publication of NZ192952ApublicationCriticalpatent/NZ192952A/en