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 N. V. Davo HaardenfabriekfiledCriticalN. V. Davo Haardenfabriek
Priority to GR610121972ApriorityCriticalpatent/GR21972B/en
Publication of GR21972BpublicationCriticalpatent/GR21972B/en