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Priority claimed from NL8500016Aexternal-prioritypatent/NL181717C/en
Application filed by Theodorus Van Gemert Hendrikus, Jan Willem MengerfiledCriticalTheodorus Van Gemert Hendrikus
Publication of NO863499D0publicationCriticalpatent/NO863499D0/en
Publication of NO863499LpublicationCriticalpatent/NO863499L/en