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.)
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Application filed by E F Roethig & SohnfiledCriticalE F Roethig & Sohn
Application grantedgrantedCritical
Publication of AT5057BpublicationCriticalpatent/AT5057B/de
