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 C W Cheney And Son Limted, Direktoer Charles William ChenfiledCriticalC W Cheney And Son Limted
Application grantedgrantedCritical
Publication of DK92390CpublicationCriticalpatent/DK92390C/da