4. Education and demonstration
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Rotating wheel toy apparatus with replaceable colored elements

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

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Rotational educational apparatus

Education and demonstration – Mathematics – Arithmetic
Patent

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Rotational movement training apparatus

Education and demonstration – Science – Physics
Patent

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Row of joined arithmetic blocks with common walls which are doub

Education and demonstration – Mathematics – Arithmetic
Patent

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Rug hooking kit and method for handicapped

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Ruggedized instrumented firefighter's vari-nozzle

Education and demonstration – Occupation – Fire fighting
Reexamination Certificate

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Runflat display

Education and demonstration – Means for demonstrating apparatus – product – or surface... – Land or water vehicle or component thereof
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Running lights simulator

Education and demonstration – Organized armed or unarmed conflict or shooting
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0
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