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Priority to ES1980248577UpriorityCriticalpatent/ES248577Y/es
Priority to DE19803008295prioritypatent/DE3008295A1/de
Priority to FR8101193Aprioritypatent/FR2474236A1/fr
Priority to US06/235,565prioritypatent/US4378546A/en
Publication of ES248577UpublicationCriticalpatent/ES248577U/es
Application grantedgrantedCritical
Publication of ES248577YpublicationCriticalpatent/ES248577Y/es