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.)
Filing date
Publication date
Application filed by Hazen ResearchfiledCriticalHazen Research
Priority to FI3973ApriorityCriticalpatent/FI56626C/fi
Publication of FI56626BpublicationCriticalpatent/FI56626B/fi
Application grantedgrantedCritical
Publication of FI56626CpublicationCriticalpatent/FI56626C/fi