4. Amusement devices: toys
  5. Operated by relatively moving fluid or pressure differential
  6. Having fluid-driven rotatable radial blade

Jahn Stopperan

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Pinwheels for playground equipment

Amusement devices: toys – Operated by relatively moving fluid or pressure differential – Having fluid-driven rotatable radial blade
Patent

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Swing speed indicator

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1142417

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