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Superimposed transparencies used in education

Education and demonstration – Mathematics – Geometry – trigonometry – or physical mathematic model structure
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Supplementary teaching instruments

Education and demonstration – Mathematics – Geometry – trigonometry – or physical mathematic model structure
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Teaching apparatus and method for visually representing polynomi

Education and demonstration – Mathematics – Geometry – trigonometry – or physical mathematic model structure
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Teaching circumference instrument

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

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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
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Tetrahedron blocks capable of assembly into cubes and pyramids

Education and demonstration – Mathematics – Geometry – trigonometry – or physical mathematic model structure
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Toy device for illustrating mathematics

Education and demonstration – Mathematics – Geometry – trigonometry – or physical mathematic model structure
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Trigonometry visualizers and method of making same

Education and demonstration – Mathematics – Geometry – trigonometry – or physical mathematic model structure
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Virtual polyhedra models

Education and demonstration – Mathematics – Geometry – trigonometry – or physical mathematic model structure
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Visual aid for teaching linear relationships

Education and demonstration – Mathematics – Geometry – trigonometry – or physical mathematic model structure
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Visual aid for teaching trigonometric functions

Education and demonstration – Mathematics – Geometry – trigonometry – or physical mathematic model structure
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Visual aids for understanding characteristics of geometric figur

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