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Individual
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Individual
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Application filed by IndividualfiledCriticalIndividual
Application grantedgrantedCritical
Publication of FR472150ApublicationCriticalpatent/FR472150A/fr
FR472150D1913-05-171914-05-13Dispositif assurant l'invariabilité de la forme de la section transversale des enveloppes pour dirigeables
ExpiredFR472150A
(fr)