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 A & P Mine Control & CommunicafiledCriticalA & P Mine Control & Communica
Priority to ZA989456ApriorityCriticalpatent/ZA989456B/en
Publication of ZA989456BpublicationCriticalpatent/ZA989456B/en