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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Publication date
Priority claimed from AT171Dexternal-prioritypatent/AT171B/de
Application filed by Alfred DervauxfiledCriticalAlfred Dervaux
Application grantedgrantedCritical
Publication of AT400BpublicationCriticalpatent/AT400B/de