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 Veikko Armas ParviainenfiledCriticalVeikko Armas Parviainen
Priority to FI844661ApriorityCriticalpatent/FI75632C/en
Publication of FI844661A0publicationCriticalpatent/FI844661A0/en
Publication of FI844661LpublicationCriticalpatent/FI844661L/en
Publication of FI75632BpublicationCriticalpatent/FI75632B/en
Application grantedgrantedCritical
Publication of FI75632CpublicationCriticalpatent/FI75632C/en