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
Priority claimed from CA167,656Aexternal-prioritypatent/CA985518A/en
Application filed by J StedingfiledCriticalJ Steding
Publication of IN140936BpublicationCriticalpatent/IN140936B/en