Means for demonstrating apparatus, product, or surface configuration, or for displaying education material or student's work > Mechanical power source (e.g., engine, windmill, etc.) > Patents - Class: 434/389

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Class Information
Number: 434/389
Name: Education and demonstration > Means for demonstrating apparatus, product, or surface configuration, or for displaying education material or student's work > Mechanical power source (e.g., engine, windmill, etc.)
Description: Subject matter relating to the structure or operation of mechanical means for producing or harnessing power.

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