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 filedfiledCritical
Priority to DD18338774ApriorityCriticalpatent/DD120538A1/xx
Priority to HUIU000283prioritypatent/HU176402B/hu
Priority to BG031702Aprioritypatent/BG29577A3/xx
Priority to CS882475Aprioritypatent/CS193699B1/cs
Publication of DD120538A1publicationCriticalpatent/DD120538A1/xx