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Priority claimed from US635237Aexternal-prioritypatent/US2924244A/en
Priority claimed from FR800905Aexternal-prioritypatent/FR1240072A/fr
Application filed by Jean MercierfiledCriticalJean Mercier
Application grantedgrantedCritical
Publication of BE596493QpublicationCriticalpatent/BE596493Q/fr