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Filing date
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Application filedfiledCritical
Priority to NL6802282ApriorityCriticalpatent/NL6802282A/xx
Priority to DE19691906694prioritypatent/DE1906694A1/de
Priority to DE19696905250prioritypatent/DE6905250U/de
Priority to GB841769Aprioritypatent/GB1198594A/en
Publication of NL6802282ApublicationCriticalpatent/NL6802282A/xx