G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
G09B1/00—Manually or mechanically operated educational appliances using elements forming, or bearing, symbols, signs, pictures, or the like which are arranged or adapted to be arranged in one or more particular ways
Landscapes
Engineering & Computer Science
(AREA)
Business, Economics & Management
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Physics & Mathematics
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Educational Administration
(AREA)
Educational Technology
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General Physics & Mathematics
(AREA)
Theoretical Computer Science
(AREA)
Developing Agents For Electrophotography
(AREA)
Photoreceptors In Electrophotography
(AREA)
Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography
(AREA)