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 Wilh Theis Senior Soehne FafiledCriticalWilh Theis Senior Soehne Fa
Publication of CH30540ApublicationCriticalpatent/CH30540A/de