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Devices used in association with a real typewriter, teleprinter, or the like
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Industry
CPC
G09B13/04
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Parent Industries
G
PHYSICS
G09
Cryptography, education, displays
G09B
EDUCATIONAL OR DEMONSTRATION APPLIANCES APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE MODELS PLANETARIA GLOBES MAPS DIAGRAMS
G09B13/00
Teaching typing
Current Industry
G09B13/04
Devices used in association with a real typewriter, teleprinter, or the like
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