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Priority claimed from US470346Aexternal-prioritypatent/US3253287A/en
Priority claimed from US469246Aexternal-prioritypatent/US3289229A/en
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Publication of BE680058ApublicationCriticalpatent/BE680058A/fr
Procede et dispositif de crantage d'un tube d'armature pour un siege de vehicule automobile, notamment un tube d'armature d'appuie-tete