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Tetrahedron blocks capable of assembly into cubes and pyramids

Education and demonstration – Mathematics – Geometry – trigonometry – or physical mathematic model structure
Patent

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Tetrahedron blocks capable of assembly into cubes and pyramids

Education and demonstration – Mathematics – Geometry – trigonometry – or physical mathematic model structure
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Tetrahedron blocks capable of assembly into cubes and pyramids

Education and demonstration – Mathematics – Geometry – trigonometry – or physical mathematic model structure
Patent

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Three-dimensional teaching device

Education and demonstration – Mathematics – Arithmetic
Patent

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Time counter controlled electronic learning aid

Education and demonstration – Mathematics – Arithmetic
Patent

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Toy and teaching aid combination

Education and demonstration – Mathematics – Arithmetic
Patent

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Toy balance concept-developing device

Education and demonstration – Mathematics – Arithmetic
Patent

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Toy device for illustrating mathematics

Education and demonstration – Mathematics – Geometry – trigonometry – or physical mathematic model structure
Patent

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Trigonometry visualizers and method of making same

Education and demonstration – Mathematics – Geometry – trigonometry – or physical mathematic model structure
Patent

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