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 Theysohn Friedrich FafiledCriticalTheysohn Friedrich Fa
Priority claimed from EP90122933Aexternal-prioritypatent/EP0487778B1/de
Application grantedgrantedCritical
Publication of ATE96725T1publicationCriticalpatent/ATE96725T1/de