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Priority to NL686801995ApriorityCriticalpatent/NL154987B/xx
Priority to US795253*Aprioritypatent/US3594901A/en
Priority to BE728236Dprioritypatent/BE728236A/xx
Priority to DE19691906918prioritypatent/DE1906918C3/de
Priority to FR6903323Aprioritypatent/FR2001803A1/fr
Publication of NL6801995ApublicationCriticalpatent/NL6801995A/xx
Publication of NL154987BpublicationCriticalpatent/NL154987B/xx