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 Johannes BehmelfiledCriticalJohannes Behmel
Priority to DD20662178ApriorityCriticalpatent/DD137560A1/de
Priority to BG7944052Aprioritypatent/BG32011A1/xx
Priority to CS426879Aprioritypatent/CS218881B1/cs
Priority to SU797770637Aprioritypatent/SU1014761A1/ru
Publication of DD137560A1publicationCriticalpatent/DD137560A1/de