4. Education and demonstration
  5. Mathematics
  6. Geometry, trigonometry, or physical mathematic model structure

Marilyn M. Dickson

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Construction system

Amusement devices: toys – Construction toy – Resilient interlocking joint
Reexamination Certificate

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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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Profile ID: LFUS-PAI-P-690673

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