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JEAN FERDINAND JALLAIS
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JEAN FERDINAND JALLAIS
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Filing date
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Application filed by JEAN FERDINAND JALLAISfiledCriticalJEAN FERDINAND JALLAIS
Application grantedgrantedCritical
Publication of FR566584ApublicationCriticalpatent/FR566584A/en
G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS