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Priority claimed from DEB57525Aexternal-prioritypatent/DE1169398B/en
Priority claimed from DEB57524Aexternal-prioritypatent/DE1159374B/en
Application filed by Bochumer Eisen HeintzmannfiledCriticalBochumer Eisen Heintzmann
Publication of BE602785ApublicationCriticalpatent/BE602785A/en