LandOfFree - US Patents - Listing for Education and demonstration,Mathematics

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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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Device and method for teaching mathematical properties...

Education and demonstration – Mathematics – Arithmetic

Reexamination Certificate

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Device for teaching counting

Education and demonstration – Mathematics

Patent

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Device for teaching decimal math

Education and demonstration – Mathematics – Arithmetic

Patent

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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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Didactic aid for the teaching of any number system

Education and demonstration – Mathematics – Base conversion or use of base other than ten

Patent

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Didactic game based on selection of the trajectories followed by

Education and demonstration – Mathematics – Base conversion or use of base other than ten

Patent

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Didactic-educational toy for elementary arithmetic operations, r

Education and demonstration – Mathematics – Arithmetic

Patent

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Die having magic squares

Education and demonstration – Mathematics – Arithmetic

Patent

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Display polyhedra having marked and unmarked paired opposing fac

Education and demonstration – Mathematics – Arithmetic

Patent

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Double-beam math balance

Education and demonstration – Mathematics – Arithmetic

Reexamination Certificate

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