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Priority claimed from CH7367459Aexternal-prioritypatent/CH382703A/de
Application filed by Hoover LtdfiledCriticalHoover Ltd
Application grantedgrantedCritical
Publication of FI45027BpublicationCriticalpatent/FI45027B/fi
Publication of FI45027CpublicationCriticalpatent/FI45027C/sv