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 Concrete Towers Proprietary LifiledCriticalConcrete Towers Proprietary Li
Priority to ZA893237ApriorityCriticalpatent/ZA893237B/en
Publication of ZA893237BpublicationCriticalpatent/ZA893237B/en