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Conic section activity boards

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

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Connector for modeling kits

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

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Device and method for solving circles

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

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Devices for transforming pictorial images in orthogonal dimensio

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

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Educational blocks

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

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Educational blocks

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

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Educational device and method

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

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Geometric building block system employing sixteen blocks, eight

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

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Geometric display device and method of demonstrating geometric s

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

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Geometric modeling kit and method of making same

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

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Geometric modeling kit and method of making same

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

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Geometry board

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

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Learning board

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

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Mathematical function demonstrator boards

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

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Mathematical instruction board and method of use

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

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Mathematical teaching aid

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

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Mathematical triangle kit and method of use

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

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Method and apparatus for guiding a user during setup of a signal

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

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Method and apparatus for teaching relationship of trigonometric

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

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Pictorial image transforming manipulatives

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

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