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 Thos Firth & Sons LtdfiledCriticalThos Firth & Sons Ltd
Application grantedgrantedCritical
Publication of AT131864BpublicationCriticalpatent/AT131864B/de