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 Michael John MawdsleyfiledCriticalMichael John Mawdsley
Priority to ZA86551ApriorityCriticalpatent/ZA86551B/en
Publication of ZA86551BpublicationCriticalpatent/ZA86551B/en