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 Charles Mac Gregor, James Mac GregorfiledCriticalCharles Mac Gregor
Priority to BE603408ApriorityCriticalpatent/BE603408A/fr
Publication of BE603408ApublicationCriticalpatent/BE603408A/fr