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G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
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FR57461A1966-04-131966-04-13
Method for the visual representation of words in alphabetic writing on a receiving surface
ExpiredFR1477828A
(en)