4. Education and demonstration
  5. Audio recording and visual means
  6. Visual information in book form

Charles A. Cummings

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Acoustic liquid level measuring apparatus

Measuring and testing – Liquid level or depth gauge
Patent

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Color reproduction method

Gas separation: apparatus – Magnetic separating means
Patent

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Device for making preselected composite designs

Education and demonstration – Visual art or craft – artistic adornment – or color training... – Drawing
Patent

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Electronically interactive target game

Amusement devices: games – Aerial projectile game; game element or accessory therefor... – Target
Reexamination Certificate

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Flying segmented ring

Amusement devices: toys – Aerodynamically supported or retarded – Spinning disc
Patent

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Profile ID: LFUS-PAI-P-21706

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