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 Otk KeskusosuusliikefiledCriticalOtk Keskusosuusliike
Priority to FI752452ApriorityCriticalpatent/FI53138C/fi
Priority to FI753672Aprioritypatent/FI53139C/fi
Priority to NO762957Aprioritypatent/NO762957L/no
Priority to SE7609532Aprioritypatent/SE412936B/xx
Priority to DK393176Aprioritypatent/DK393176A/da
Publication of FI752452A7publicationCriticalpatent/FI752452A7/fi
Publication of FI53138BpublicationCriticalpatent/FI53138B/fi
Application grantedgrantedCritical
Publication of FI53138CpublicationCriticalpatent/FI53138C/fi
E04D5/00—Roof covering by making use of flexible material, e.g. supplied in roll form
E04D5/02—Roof covering by making use of flexible material, e.g. supplied in roll form of materials impregnated with sealing substances, e.g. roofing felt