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Priority to ES1981255767UpriorityCriticalpatent/ES255767Y/es
Priority to GB8128471Aprioritypatent/GB2084029B/en
Priority to US06/303,936prioritypatent/US4466611A/en
Priority to FR8118264Aprioritypatent/FR2490967B1/fr
Priority to IT24165/81Aprioritypatent/IT1138638B/it
Publication of ES255767UpublicationCriticalpatent/ES255767U/es
Application grantedgrantedCritical
Publication of ES255767YpublicationCriticalpatent/ES255767Y/es