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Priority to DE19712144909priorityCriticalpatent/DE2144909C/de
Priority claimed from DE19712144909external-prioritypatent/DE2144909C/de
Priority to GB3996772Aprioritypatent/GB1400778A/en
Publication of DE2144909A1publicationCriticalpatent/DE2144909A1/de
Priority to FR7231544Aprioritypatent/FR2152659B1/fr
Priority to IT28891/72Aprioritypatent/IT967211B/it
Priority to US00287013Aprioritypatent/US3809176A/en
Application grantedgrantedCritical
Publication of DE2144909CpublicationCriticalpatent/DE2144909C/de