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 Helmut Dr Ing PiatscheckfiledCriticalHelmut Dr Ing Piatscheck
Application grantedgrantedCritical
Publication of DK99057CpublicationCriticalpatent/DK99057C/en