Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Martti FilppulafiledCriticalMartti Filppula
Priority to FI903120ApriorityCriticalpatent/FI903120A/fi
Publication of FI903120A0publicationCriticalpatent/FI903120A0/fi
Priority to FI904427Aprioritypatent/FI904427A/fi
Publication of FI903120ApublicationCriticalpatent/FI903120A/fi