TREA

involving the optical projection of slides, microfilm or the like

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Industry

  • CPC
  • G09B29/104
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Parent Industries

GPHYSICS G09Cryptography, education, displays G09BEDUCATIONAL OR DEMONSTRATION APPLIANCES APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE MODELS PLANETARIA GLOBES MAPS DIAGRAMS G09B29/00Maps Plans Charts Diagrams

Current Industry

G09B29/104involving the optical projection of slides, microfilm or the like
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