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
Priority to DE1912269134DpriorityCriticalpatent/DE269134C/de
Priority to FR458197Aprioritypatent/FR458197A/fr
Priority to GB191312375Dprioritypatent/GB191312375A/en
Application filed by Hirth AlfonsfiledCriticalHirth Alfons
Priority to NL2692Aprioritypatent/NL771C/nl
Application grantedgrantedCritical
Publication of NL771CpublicationCriticalpatent/NL771C/nl