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Priority claimed from FI770049Aexternal-prioritypatent/FI63659C/en
Application filed by Townsend Engineering CofiledCriticalTownsend Engineering Co
Publication of FI780364ApublicationCriticalpatent/FI780364A/en
Publication of FI63660BpublicationCriticalpatent/FI63660B/en
Application grantedgrantedCritical
Publication of FI63660CpublicationCriticalpatent/FI63660C/en
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