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 DEK40258ApriorityCriticalpatent/DE1292154B/de
Priority to DEK45686Aprioritypatent/DE1292155B/de
Priority to CH896068Aprioritypatent/CH481273A/de
Priority to LU56290Dprioritypatent/LU56290A1/xx
Application filedfiledCritical
Priority to NL6808585Aprioritypatent/NL6808585A/xx
Priority to BE717063Dprioritypatent/BE717063A/xx
Priority to FR156265Aprioritypatent/FR1583922A/fr
Publication of NL6808585ApublicationCriticalpatent/NL6808585A/xx
