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Application filed by David John InstancefiledCriticalDavid John Instance
Priority to FI840844ApriorityCriticalpatent/FI82012C/fi
Publication of FI840844A0publicationCriticalpatent/FI840844A0/fi
Publication of FI840844ApublicationCriticalpatent/FI840844A/fi
Application grantedgrantedCritical
Publication of FI82012BpublicationCriticalpatent/FI82012B/fi
Publication of FI82012CpublicationCriticalpatent/FI82012C/fi