Legal status (The legal status 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 status listed.)
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.)
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Priority to JP1163874ApriorityCriticalpatent/JPS5420074B2/ja
Priority to DE19742425391prioritypatent/DE2425391A1/de
Priority to FR7418472Aprioritypatent/FR2231348A1/fr
Priority to IT68656/74Aprioritypatent/IT1011887B/it
Priority to US473837Aprioritypatent/US3909869A/en
Publication of JPS50103860ApublicationCriticalpatent/JPS50103860A/ja
Publication of JPS5420074B2publicationCriticalpatent/JPS5420074B2/ja