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Application filedfiledCritical
Priority to FR166054ApriorityCriticalpatent/FR7790M/fr
Priority to BE734121Dprioritypatent/BE734121A/xx
Priority to CH893369Aprioritypatent/CH506519A/fr
Priority to DE19691929839prioritypatent/DE1929839C/de
Priority to GB1226896Dprioritypatent/GB1226896A/en
Priority to NL6909035Aprioritypatent/NL6909035A/xx
Application grantedgrantedCritical
Publication of FR7790MpublicationCriticalpatent/FR7790M/fr