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Priority to ES1980253173UpriorityCriticalpatent/ES253173Y/en
Publication of ES253173UpublicationCriticalpatent/ES253173U/en
Priority to GB8128471Aprioritypatent/GB2084029B/en
Priority to US06/303,936prioritypatent/US4466611A/en
Priority to FR8118264Aprioritypatent/FR2490967B1/en
Priority to IT24165/81Aprioritypatent/IT1138638B/en
Application grantedgrantedCritical
Publication of ES253173YpublicationCriticalpatent/ES253173Y/en