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 US218542ApriorityCriticalpatent/US3231606A/en
Application filedfiledCritical
Priority to NL6600282Aprioritypatent/NL6600282A/xx
Priority to BE674882Aprioritypatent/BE674882A/xx
Priority to FR45689Aprioritypatent/FR1463511A/fr
Publication of BE674882ApublicationCriticalpatent/BE674882A/xx